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Dépouillements
Ajouter le résultat dans votre panierCulture, Education and Conflict : The Relevance of Critical Conservation Pedagogies for Post-conflict Afghanistan / Richard Mulholland in Studies in conservation, Vol.68 N°3-4(2023; April-May) (2023-04-03)
Titre : Culture, Education and Conflict : The Relevance of Critical Conservation Pedagogies for Post-conflict Afghanistan Type de document : texte imprimé Auteurs : Richard Mulholland, Auteur Année de publication : 2023 Article en page(s) : Pages 283-297 Note générale : Article en libre accès (open access).
https://www.tandfonline.com/doi/pdf/10.1080/00393630.2022.2025706Langues : Anglais (eng) Catégories : National museum of Afghanistan (Kaboul)
Patrimoine culturel -- Afghanistan -- 2001-.... (Guerre d'Afghanistan) -- Conservation et restauration
Trésors artistiques durant la guerre -- Afghanistan -- Conservation et restaurationIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
There has been considerable focus on the widespread destruction of cultural heritage in Afghanistan since the destruction of the Bamiyan Buddhas by the Taliban in 2001 and much concern over the future for heritage in the region on the return of a Taliban regime in 2021, yet comparatively little has been written on the fate of Afghanistan’s national collection of paintings, manuscripts, and works on paper. Through a quasi-experimental study and using a combination of evaluation methodologies, this paper discusses whether the overall impact achieved in conservation capacity-building and training schemes in conflict zones justify the cost and risk of operating in such regions. Using an international collaborative conservation training course carried out in 2020 at the Afghan National Gallery in Kabul as a case study, it discusses the appropriateness and effectiveness of the signature pedagogies in conservation when working in a conflict scenario, and highlights the limitations present in conservation training programmes in post-conflict scenarios and the need for sustainability of such programmes. The results of the study found that common constructivist-focused, Eurocentric conservation pedagogies may not be effective for training museum professionals in regions where this approach is unfamiliar.En ligne : https://www.tandfonline.com/doi/pdf/10.1080/00393630.2022.2025706
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 283-297[article] Culture, Education and Conflict : The Relevance of Critical Conservation Pedagogies for Post-conflict Afghanistan [texte imprimé] / Richard Mulholland, Auteur . - 2023 . - Pages 283-297.
Article en libre accès (open access).
https://www.tandfonline.com/doi/pdf/10.1080/00393630.2022.2025706
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 283-297
Catégories : National museum of Afghanistan (Kaboul)
Patrimoine culturel -- Afghanistan -- 2001-.... (Guerre d'Afghanistan) -- Conservation et restauration
Trésors artistiques durant la guerre -- Afghanistan -- Conservation et restaurationIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
There has been considerable focus on the widespread destruction of cultural heritage in Afghanistan since the destruction of the Bamiyan Buddhas by the Taliban in 2001 and much concern over the future for heritage in the region on the return of a Taliban regime in 2021, yet comparatively little has been written on the fate of Afghanistan’s national collection of paintings, manuscripts, and works on paper. Through a quasi-experimental study and using a combination of evaluation methodologies, this paper discusses whether the overall impact achieved in conservation capacity-building and training schemes in conflict zones justify the cost and risk of operating in such regions. Using an international collaborative conservation training course carried out in 2020 at the Afghan National Gallery in Kabul as a case study, it discusses the appropriateness and effectiveness of the signature pedagogies in conservation when working in a conflict scenario, and highlights the limitations present in conservation training programmes in post-conflict scenarios and the need for sustainability of such programmes. The results of the study found that common constructivist-focused, Eurocentric conservation pedagogies may not be effective for training museum professionals in regions where this approach is unfamiliar.En ligne : https://www.tandfonline.com/doi/pdf/10.1080/00393630.2022.2025706
Titre : Defining Damage and Susceptibility, with Implications for Mineral Specimens and Objects : Introducing the Mineral Susceptibility Database Type de document : texte imprimé Auteurs : Kathryn Royce, Auteur Année de publication : 2023 Article en page(s) : Pages 298-317 Note générale : Article en libre accès (open access).
https://www.tandfonline.com/doi/epdf/10.1080/00393630.2021.2015947?needAccess=true&role=buttonLangues : Anglais (eng) Catégories : Conservation et restauration -- Terminologie
Minéralogie -- Conservation et restauration
Minéraux -- Conservation et restauration -- Bases de données
Musées géologiques -- Conservation et restaurationMots-clés : Susceptibilité Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Damage and susceptibility are key concepts in conservation but are rarely explicitly defined. This paper provides definitions for these terms and applies them to mineral collections. Minerals are often overlooked in the context of heritage conservation due to their assumed stability. While many appear to be stable under ambient conditions, at least 10% of known mineral species are susceptible to temperature, moisture, light, or pollutant levels common in museum stores and displays. These susceptible minerals are represented in museums as natural history specimens (as crystals and inclusions within rocks and fossils), pigments in paintings, and deterioration products of other minerals, metals, and many other object types. A new online resource, the Mineral Susceptibility Database, has been designed to facilitate the preservation of minerals by providing relevant information in a single, accessible location. Data were collated and synthesised from various fields of research, many of which are not easily accessible to museum professionals. As an open repository of interdisciplinary research, the Mineral Susceptibility Database encourages informed decision-making and advocates cross-disciplinary communication, both of which are necessary to improve the care of mineral and geological materials.En ligne : https://www.tandfonline.com/doi/epdf/10.1080/00393630.2021.2015947?needAccess=tr [...]
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 298-317[article] Defining Damage and Susceptibility, with Implications for Mineral Specimens and Objects : Introducing the Mineral Susceptibility Database [texte imprimé] / Kathryn Royce, Auteur . - 2023 . - Pages 298-317.
Article en libre accès (open access).
https://www.tandfonline.com/doi/epdf/10.1080/00393630.2021.2015947?needAccess=true&role=button
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 298-317
Catégories : Conservation et restauration -- Terminologie
Minéralogie -- Conservation et restauration
Minéraux -- Conservation et restauration -- Bases de données
Musées géologiques -- Conservation et restaurationMots-clés : Susceptibilité Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Damage and susceptibility are key concepts in conservation but are rarely explicitly defined. This paper provides definitions for these terms and applies them to mineral collections. Minerals are often overlooked in the context of heritage conservation due to their assumed stability. While many appear to be stable under ambient conditions, at least 10% of known mineral species are susceptible to temperature, moisture, light, or pollutant levels common in museum stores and displays. These susceptible minerals are represented in museums as natural history specimens (as crystals and inclusions within rocks and fossils), pigments in paintings, and deterioration products of other minerals, metals, and many other object types. A new online resource, the Mineral Susceptibility Database, has been designed to facilitate the preservation of minerals by providing relevant information in a single, accessible location. Data were collated and synthesised from various fields of research, many of which are not easily accessible to museum professionals. As an open repository of interdisciplinary research, the Mineral Susceptibility Database encourages informed decision-making and advocates cross-disciplinary communication, both of which are necessary to improve the care of mineral and geological materials.En ligne : https://www.tandfonline.com/doi/epdf/10.1080/00393630.2021.2015947?needAccess=tr [...]
Titre : Conservation of Tortoise Shell Using Hydroxyapatite / Collagen as a Consolidation Material Type de document : texte imprimé Année de publication : 2023 Article en page(s) : Pages 318-325 Langues : Anglais (eng) Catégories : Hydroxyapatite
Microscopie électronique à balayage
Reliques -- Chine -- Antiquité -- Conservation et restauration
Tortues -- Chine -- AntiquitéMots-clés : HAp/collagène Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
The ability of hydroxyapatite (HAp)/collagen to consolidate tortoise shell relics was assessed. The chromatic parameters and hardness index of simulated weathered tortoise shells were measured before and after treatment to assess the effect of the application of HAp/collagen material. The HAp particles formed stable colloids under the proper conditions, and their average size was approximately 35 nm. SEM images showed that the HAp/collagen material was effective at filling and bonding the openings of the weathered tortoise shell. Compared with the control materials HAp and DAP/Ca(OH)2, HAp/collagen exhibited the best ability to consolidate simulated weathered tortoise shells. These results suggest a promising new and compatible method for the preservation of tortoise shell relics.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 318-325[article] Conservation of Tortoise Shell Using Hydroxyapatite / Collagen as a Consolidation Material [texte imprimé] . - 2023 . - Pages 318-325.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 318-325
Catégories : Hydroxyapatite
Microscopie électronique à balayage
Reliques -- Chine -- Antiquité -- Conservation et restauration
Tortues -- Chine -- AntiquitéMots-clés : HAp/collagène Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
The ability of hydroxyapatite (HAp)/collagen to consolidate tortoise shell relics was assessed. The chromatic parameters and hardness index of simulated weathered tortoise shells were measured before and after treatment to assess the effect of the application of HAp/collagen material. The HAp particles formed stable colloids under the proper conditions, and their average size was approximately 35 nm. SEM images showed that the HAp/collagen material was effective at filling and bonding the openings of the weathered tortoise shell. Compared with the control materials HAp and DAP/Ca(OH)2, HAp/collagen exhibited the best ability to consolidate simulated weathered tortoise shells. These results suggest a promising new and compatible method for the preservation of tortoise shell relics.
Titre : A Technical Examination of the Great Bronzes of the Museo Nazionale Romano Type de document : texte imprimé Auteurs : Olimpia Colacicchi Alessandri, Auteur Année de publication : 2023 Article en page(s) : Pages 326-342 Langues : Anglais (eng) Catégories : Bronzes -- Conservation et restauration -- Méthodologie
Bronzes hellénistiques -- Conservation et restauration
Diagnostic non invasif
Museo nazionale romano (Rome)
Procédés de fabrication -- Méthode comparative
Sculpture monumentale -- Grèce -- Antiquité -- Conservation et restaurationIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Creating large bronze statues is one of the boldest technological challenges faced by the makers of past material cultures. Investigation of these relatively uncommon artefacts relies on various methods such as visual observation, instrumental methods, and replica experiments. Most important is comparative observation, that is, observing the occurrence of a given technical feature in different statues. Having points of comparison is therefore crucial to investigate the technology of large bronze statuary. This paper aims at extending comparison possibilities by presenting and globally discussing the outcomes of the investigations that have taken place since the mid-1980s on the bronze statues of the Boxer at Rest and the Hellenistic Prince exhibited at the museum of Palazzo Massimo in Rome. Different aspects of the construction of the statues such as the preparation of the wax models, the casting sections, the welding, and the alloys are addressed. Whenever possible specific technical features are compared with similar ones observed in other statues. As often occurs in scientific research, a deeper knowledge of the artefacts has produced some answers and many additional questions.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 326-342[article] A Technical Examination of the Great Bronzes of the Museo Nazionale Romano [texte imprimé] / Olimpia Colacicchi Alessandri, Auteur . - 2023 . - Pages 326-342.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 326-342
Catégories : Bronzes -- Conservation et restauration -- Méthodologie
Bronzes hellénistiques -- Conservation et restauration
Diagnostic non invasif
Museo nazionale romano (Rome)
Procédés de fabrication -- Méthode comparative
Sculpture monumentale -- Grèce -- Antiquité -- Conservation et restaurationIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Creating large bronze statues is one of the boldest technological challenges faced by the makers of past material cultures. Investigation of these relatively uncommon artefacts relies on various methods such as visual observation, instrumental methods, and replica experiments. Most important is comparative observation, that is, observing the occurrence of a given technical feature in different statues. Having points of comparison is therefore crucial to investigate the technology of large bronze statuary. This paper aims at extending comparison possibilities by presenting and globally discussing the outcomes of the investigations that have taken place since the mid-1980s on the bronze statues of the Boxer at Rest and the Hellenistic Prince exhibited at the museum of Palazzo Massimo in Rome. Different aspects of the construction of the statues such as the preparation of the wax models, the casting sections, the welding, and the alloys are addressed. Whenever possible specific technical features are compared with similar ones observed in other statues. As often occurs in scientific research, a deeper knowledge of the artefacts has produced some answers and many additional questions.
Titre : Preventive Conservation, Treatment, and Technical Study of Plasticized Poly(vinyl chloride) Multiples by Joseph Beuys Type de document : texte imprimé Auteurs : Nicole Ledoux, Auteur Année de publication : 2023 Article en page(s) : Pages 343-356 Langues : Anglais (eng) Catégories : Beuys, Joseph (1921-1986)
Chambres froides
Chlorure de polyvinyle
Chromatographie en phase gazeuse
Matières plastiques -- Dans l'art -- Analyse
Matières plastiques -- Dans l'art -- Conservation et restauration
Matières plastiques -- Dans l'art -- Séchage
Microscopie électronique à balayage
Plastifiants
Spectrométrie de masse
Spectroscopie des rayons XIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Works of art made of plasticized poly(vinyl chloride) (PVC) present unique and pressing conservation challenges. Due to inherently unstable formulations, PVC can deteriorate rapidly, producing dramatic alterations that were unanticipated by artists and collectors. This is the case for three works by Joseph Beuys with PVC components in the Harvard Art Museums’ collection: Phosphorus-Cross Sled, Postcards 1968–1974, and Stamp Sculpture. Over the course of the last two decades, exudation of liquid plasticizer and progressive discoloration of the PVC was observed and appeared to be worsening with time. This paper presents the results of research undertaken since 2012 to develop storage and display guidelines that will slow the deterioration and improve the accessibility of these works. The three objects under study are all multiples, meaning that they were released in editions, which are now dispersed across numerous museums and private collections. Analysis using gas chromatography-mass spectrometry (GC-MS, with and without pyrolysis) and scanning electron microscopy with energy dispersive X-ray (SEM-EDX) spectroscopy has identified variability in the PVC formulation and exudate across different multiples, suggesting that they may derive from different manufacturing batches. Experimental testing of PVC material from Beuys’s studio has shown that sealed Mylar enclosures and storage at temperatures between 4.4 and 12.8 °C are effective in slowing the migration of plasticizer to the surface. After implementing these changes to the housing and storage of the PVC postcard from Postcards 1968–1974, reabsorption of plasticizer exudate was observed, demonstrating that reversal of the plasticizer migration is possible under these conditions.En ligne : https://www.tandfonline.com/doi/full/10.1080/00393630.2022.2033520
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 343-356[article] Preventive Conservation, Treatment, and Technical Study of Plasticized Poly(vinyl chloride) Multiples by Joseph Beuys [texte imprimé] / Nicole Ledoux, Auteur . - 2023 . - Pages 343-356.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 343-356
Catégories : Beuys, Joseph (1921-1986)
Chambres froides
Chlorure de polyvinyle
Chromatographie en phase gazeuse
Matières plastiques -- Dans l'art -- Analyse
Matières plastiques -- Dans l'art -- Conservation et restauration
Matières plastiques -- Dans l'art -- Séchage
Microscopie électronique à balayage
Plastifiants
Spectrométrie de masse
Spectroscopie des rayons XIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Works of art made of plasticized poly(vinyl chloride) (PVC) present unique and pressing conservation challenges. Due to inherently unstable formulations, PVC can deteriorate rapidly, producing dramatic alterations that were unanticipated by artists and collectors. This is the case for three works by Joseph Beuys with PVC components in the Harvard Art Museums’ collection: Phosphorus-Cross Sled, Postcards 1968–1974, and Stamp Sculpture. Over the course of the last two decades, exudation of liquid plasticizer and progressive discoloration of the PVC was observed and appeared to be worsening with time. This paper presents the results of research undertaken since 2012 to develop storage and display guidelines that will slow the deterioration and improve the accessibility of these works. The three objects under study are all multiples, meaning that they were released in editions, which are now dispersed across numerous museums and private collections. Analysis using gas chromatography-mass spectrometry (GC-MS, with and without pyrolysis) and scanning electron microscopy with energy dispersive X-ray (SEM-EDX) spectroscopy has identified variability in the PVC formulation and exudate across different multiples, suggesting that they may derive from different manufacturing batches. Experimental testing of PVC material from Beuys’s studio has shown that sealed Mylar enclosures and storage at temperatures between 4.4 and 12.8 °C are effective in slowing the migration of plasticizer to the surface. After implementing these changes to the housing and storage of the PVC postcard from Postcards 1968–1974, reabsorption of plasticizer exudate was observed, demonstrating that reversal of the plasticizer migration is possible under these conditions.En ligne : https://www.tandfonline.com/doi/full/10.1080/00393630.2022.2033520
Titre : Investigating Nineteenth Century Gel Mediums: From Historical Recipes to Model Systems Type de document : texte imprimé Auteurs : Université Paris-Sorbonne (Paris), Auteur Année de publication : 2023 Article en page(s) : Pages 357-364 Langues : Anglais (eng) Catégories : Colloïdes
Fourier, Spectroscopie infrarouge à transformée de
Gélification -- Teneur en plomb
Liants -- 19e siècle -- Formules et recettes
Peinture -- Matériaux -- 19e siècle -- Composition chimique
VernisMots-clés : Megilp Métal-résine Gumtion Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Gelled mediums were widely used during the nineteenth century, added to paint on the palette to modify its rheological, optical, and drying properties. Many variations of gelled mediums exist in the literature, all with the common basis of mastic resin or varnish, drying oil, and a lead compound. With the aim of unveiling the chemistry of such systems, reconstructions were carried out not only following the historical recipes, but in addition, exploring variations and simplifications to get a better understanding of the key ingredients and interactions inducing gelation. Different parameters were tested to establish whether these have an impact on the gelation mechanisms, particularly the influence of the nature and proportions of the ingredients and the preparation process. These reconstructions and their FTIR characterisation reveal the formation of metal-resin soaps, but also underline the specific role of lead in the gelation.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 357-364[article] Investigating Nineteenth Century Gel Mediums: From Historical Recipes to Model Systems [texte imprimé] / Université Paris-Sorbonne (Paris), Auteur . - 2023 . - Pages 357-364.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 357-364
Catégories : Colloïdes
Fourier, Spectroscopie infrarouge à transformée de
Gélification -- Teneur en plomb
Liants -- 19e siècle -- Formules et recettes
Peinture -- Matériaux -- 19e siècle -- Composition chimique
VernisMots-clés : Megilp Métal-résine Gumtion Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Gelled mediums were widely used during the nineteenth century, added to paint on the palette to modify its rheological, optical, and drying properties. Many variations of gelled mediums exist in the literature, all with the common basis of mastic resin or varnish, drying oil, and a lead compound. With the aim of unveiling the chemistry of such systems, reconstructions were carried out not only following the historical recipes, but in addition, exploring variations and simplifications to get a better understanding of the key ingredients and interactions inducing gelation. Different parameters were tested to establish whether these have an impact on the gelation mechanisms, particularly the influence of the nature and proportions of the ingredients and the preparation process. These reconstructions and their FTIR characterisation reveal the formation of metal-resin soaps, but also underline the specific role of lead in the gelation.
Titre : Colors, Materials, and Techniques in Historical Buildings in Rome : Diagnostic Investigations and Case Studies Type de document : texte imprimé Année de publication : 2023 Article en page(s) : Pages 365-379 Langues : Anglais (eng) Catégories : Couleur en architecture -- Façades -- Rome -- 20e siècle -- Conservation et restauration
Essais (technologie)
Fourier, Spectroscopie infrarouge à transformée de
Microscopie électronique à balayage
Monuments historiques -- Conservation et restauration -- Datation
Monuments historiques -- Façades -- Rome -- 20e siècle -- Conservation et restauration
Pigments -- Analyse
StratigraphieIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
In the last few years, the study of the surface color of historical buildings has progressed as part of conservation and restoration efforts to comply with the aesthetics of historical and pre-existing materials. The main critical element related to this type of study is represented by the succession of various interventions of restoration and maintenance over time that has altered the original aesthetics of monuments by using materials and colors selected according to criteria, trends, and needs of succeeding historical eras. In this paper, the investigation of plasters and colored finishing layers applied on two historical buildings located in Rome and dating to the early 1900s is reported. Results were obtained through a specific diagnostic investigation plan focused on microscopic, morphological, and chemical characterizations of plasters and colored layers detected on the monument surfaces. All post-intervention phases and dates have been identified by comparing the results obtained with historical data. Important information was uncovered that helps in tracing the original aesthetic conception of the buildings and in planning restoration approaches which can be compatible both aesthetically and materially with the original work.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 365-379[article] Colors, Materials, and Techniques in Historical Buildings in Rome : Diagnostic Investigations and Case Studies [texte imprimé] . - 2023 . - Pages 365-379.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 365-379
Catégories : Couleur en architecture -- Façades -- Rome -- 20e siècle -- Conservation et restauration
Essais (technologie)
Fourier, Spectroscopie infrarouge à transformée de
Microscopie électronique à balayage
Monuments historiques -- Conservation et restauration -- Datation
Monuments historiques -- Façades -- Rome -- 20e siècle -- Conservation et restauration
Pigments -- Analyse
StratigraphieIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
In the last few years, the study of the surface color of historical buildings has progressed as part of conservation and restoration efforts to comply with the aesthetics of historical and pre-existing materials. The main critical element related to this type of study is represented by the succession of various interventions of restoration and maintenance over time that has altered the original aesthetics of monuments by using materials and colors selected according to criteria, trends, and needs of succeeding historical eras. In this paper, the investigation of plasters and colored finishing layers applied on two historical buildings located in Rome and dating to the early 1900s is reported. Results were obtained through a specific diagnostic investigation plan focused on microscopic, morphological, and chemical characterizations of plasters and colored layers detected on the monument surfaces. All post-intervention phases and dates have been identified by comparing the results obtained with historical data. Important information was uncovered that helps in tracing the original aesthetic conception of the buildings and in planning restoration approaches which can be compatible both aesthetically and materially with the original work.
Titre : A Simple Method for Optimal DNA Extraction from Different Filamentous Fungi Species Growing on Earthen Walls of ‘Vale Histórico Paulista’, São Paulo, Brazil Type de document : texte imprimé Année de publication : 2023 Article en page(s) : Pages 380-387 Langues : Anglais (eng) Catégories : ADN -- Amplification
Biologie moléculaire fongique
Champignons -- Identification
Constructions en terre -- Amérique du Sud -- Biodégradation
Constructions en terre -- São Paulo (Brésil) -- Conservation et restauration
Extraction (chimie) -- Méthodologie
Hyphes
MycéliumIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
This study aims to describe a new simple and efficient method of extracting DNA from filamentous fungi isolated from historical earthen walls. This method involves growing the mycelium on overlapping cellophane discs on solid medium and the disruption of the fungal cell wall by a combined action of liquid nitrogen and a lytic enzyme. The extraction is performed with the PureLink ™ Genomic DNA Mini Kit protocol from Pure Genomic. The full procedure can be completed in two hours. The new genomic DNA extraction protocol provided good quality and quantity of fungal DNA, from fungal mycelium, with an average yield of 27 ng/µL of DNA per sample. Purified DNA samples yielded 25 ng of DNA ready for sequencing. PCR amplifications of the DNA extracted using the new method were more successful than those extracted using the CTAB method. Thus this new extraction protocol is demonstrated to be an effective method for the identification of a wide range of filamentous fungal species that affect the integrity of buildings with earthen architecture.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 380-387[article] A Simple Method for Optimal DNA Extraction from Different Filamentous Fungi Species Growing on Earthen Walls of ‘Vale Histórico Paulista’, São Paulo, Brazil [texte imprimé] . - 2023 . - Pages 380-387.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 380-387
Catégories : ADN -- Amplification
Biologie moléculaire fongique
Champignons -- Identification
Constructions en terre -- Amérique du Sud -- Biodégradation
Constructions en terre -- São Paulo (Brésil) -- Conservation et restauration
Extraction (chimie) -- Méthodologie
Hyphes
MycéliumIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
This study aims to describe a new simple and efficient method of extracting DNA from filamentous fungi isolated from historical earthen walls. This method involves growing the mycelium on overlapping cellophane discs on solid medium and the disruption of the fungal cell wall by a combined action of liquid nitrogen and a lytic enzyme. The extraction is performed with the PureLink ™ Genomic DNA Mini Kit protocol from Pure Genomic. The full procedure can be completed in two hours. The new genomic DNA extraction protocol provided good quality and quantity of fungal DNA, from fungal mycelium, with an average yield of 27 ng/µL of DNA per sample. Purified DNA samples yielded 25 ng of DNA ready for sequencing. PCR amplifications of the DNA extracted using the new method were more successful than those extracted using the CTAB method. Thus this new extraction protocol is demonstrated to be an effective method for the identification of a wide range of filamentous fungal species that affect the integrity of buildings with earthen architecture.
Titre : Ancient Marbles : Philosophical Reflections on the Restoration of Sculpture Type de document : texte imprimé Auteurs : University of California, Los Angeles, Auteur Année de publication : 2023 Article en page(s) : Pages 388-406 Langues : Anglais (eng) Catégories : Conservation et restauration -- Esthétique
Conservation et restauration -- Philosophie -- Histoire et critique
Historicité-- Conservation et restauration
Michel-Ange (1475-1564). Pietà
Philosophie comparée
Philosophie et art
Sculpture en marbre -- Conservation et restauration -- Philosophie
Sculpture en marbre antique -- Rome (Italie)Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
The article discusses different approaches to the problems of restoration of marble sculpture in terms of the philosophical justifications taken towards the artworks. One of the aims of the paper is to contrast the approach taken towards the subject of restoration by Western philosophers and to compare that with the field of conservation. A few brief paragraphs frame the discussion of restoration. The nature of the fragment in its historical and aesthetic duality is then discussed, taking a brief incursion into the topic of supervenience. Michelangelo’s Pietà and its restoration, following from extensive damage caused in 1974 by a museum visitor, results in a series of disputations between writers who favour a purist restoration and those who prefer an aesthetic reintegration of the work. The work of several philosophers who have written about sculpture and restoration is reviewed. The Pietà case study is contrasted with the restoration of the Lansdowne Heracles in the Getty Museum. It is essential to also consider here marble sculpture in terms of works that have been re-restored, de-restored, and deceptively partially restored, taking as a seminal example of the latter, the Adam by Lombardo in the Metropolitan Museum of Art. The conclusion attempts to bring together some of the issues raised in the paper, including a discussion of the extent to which information is displayed in the museum for the benefit of the observer, and the importance of the role of the conservator in all aspects of the de-restoration and re-restoration of marble sculpture.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 388-406[article] Ancient Marbles : Philosophical Reflections on the Restoration of Sculpture [texte imprimé] / University of California, Los Angeles, Auteur . - 2023 . - Pages 388-406.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 388-406
Catégories : Conservation et restauration -- Esthétique
Conservation et restauration -- Philosophie -- Histoire et critique
Historicité-- Conservation et restauration
Michel-Ange (1475-1564). Pietà
Philosophie comparée
Philosophie et art
Sculpture en marbre -- Conservation et restauration -- Philosophie
Sculpture en marbre antique -- Rome (Italie)Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
The article discusses different approaches to the problems of restoration of marble sculpture in terms of the philosophical justifications taken towards the artworks. One of the aims of the paper is to contrast the approach taken towards the subject of restoration by Western philosophers and to compare that with the field of conservation. A few brief paragraphs frame the discussion of restoration. The nature of the fragment in its historical and aesthetic duality is then discussed, taking a brief incursion into the topic of supervenience. Michelangelo’s Pietà and its restoration, following from extensive damage caused in 1974 by a museum visitor, results in a series of disputations between writers who favour a purist restoration and those who prefer an aesthetic reintegration of the work. The work of several philosophers who have written about sculpture and restoration is reviewed. The Pietà case study is contrasted with the restoration of the Lansdowne Heracles in the Getty Museum. It is essential to also consider here marble sculpture in terms of works that have been re-restored, de-restored, and deceptively partially restored, taking as a seminal example of the latter, the Adam by Lombardo in the Metropolitan Museum of Art. The conclusion attempts to bring together some of the issues raised in the paper, including a discussion of the extent to which information is displayed in the museum for the benefit of the observer, and the importance of the role of the conservator in all aspects of the de-restoration and re-restoration of marble sculpture.
Titre : Microstratigraphic Research of Altered Medieval Painted Plaster Fragments from the St John Monastery in Müstair (Grison Canton, Switzerland) Type de document : texte imprimé Année de publication : 2023 Article en page(s) : Pages 407-417 Langues : Anglais (eng) Catégories : Diagnostic non invasif
Microscopie de polarisation
Microscopie électronique à balayage
Monastère de Saint-Jean (Müstair, Suisse)
Peinture et décoration murales médiévales -- Effets du feu
Peinture et décoration murales médiévales -- Müstair (Grisons, Suisse) -- Conservation et restauration
Pigments -- 13e siècle -- Analyse
Pigments -- Déterioration
Plâtre -- Coloration -- Déterioration
Spectrométrie PIXE
StratigraphieIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Medieval wall paintings in the church of the monastery of St. John in Müstair (Switzerland) have been exposed to several fires over the last centuries. Non-invasive (hand-held-XRF) and microinvasive (PLM, SEM-EDX, XRPD, µ-Raman, and SERS) techniques were used to analyse 14 painted fragments from the Romanesque (c. 1200 CE) painting cycle recovered from the attic of the church above younger Gothic vaulting in order to study the microstratigraphy of the painted surfaces and determine alterations and newly formed products, with the aim of understanding if the darkening was directly attributable to contact with fire. Scientific, historical, and bibliographical research have shown that alteration processes in the pigments from these paintings are not directly linked with fires, except possibly for two lead-based painted fragments. This indicates that the action of the historically documented fires in the church was not uniform and did not affect all areas of the paintings equally.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 407-417[article] Microstratigraphic Research of Altered Medieval Painted Plaster Fragments from the St John Monastery in Müstair (Grison Canton, Switzerland) [texte imprimé] . - 2023 . - Pages 407-417.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 407-417
Catégories : Diagnostic non invasif
Microscopie de polarisation
Microscopie électronique à balayage
Monastère de Saint-Jean (Müstair, Suisse)
Peinture et décoration murales médiévales -- Effets du feu
Peinture et décoration murales médiévales -- Müstair (Grisons, Suisse) -- Conservation et restauration
Pigments -- 13e siècle -- Analyse
Pigments -- Déterioration
Plâtre -- Coloration -- Déterioration
Spectrométrie PIXE
StratigraphieIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Medieval wall paintings in the church of the monastery of St. John in Müstair (Switzerland) have been exposed to several fires over the last centuries. Non-invasive (hand-held-XRF) and microinvasive (PLM, SEM-EDX, XRPD, µ-Raman, and SERS) techniques were used to analyse 14 painted fragments from the Romanesque (c. 1200 CE) painting cycle recovered from the attic of the church above younger Gothic vaulting in order to study the microstratigraphy of the painted surfaces and determine alterations and newly formed products, with the aim of understanding if the darkening was directly attributable to contact with fire. Scientific, historical, and bibliographical research have shown that alteration processes in the pigments from these paintings are not directly linked with fires, except possibly for two lead-based painted fragments. This indicates that the action of the historically documented fires in the church was not uniform and did not affect all areas of the paintings equally.
Titre : Investigations of Painting Techniques : Edirne Süleyman Pasha Mosque Wall Paintings Type de document : texte imprimé Année de publication : 2023 Article en page(s) : Pages 418-431 Langues : Anglais (eng) Catégories : Edirne (Turquie) -- Selimiye camisi
Fourier, Spectroscopie infrarouge à transformée de
Microscopie électronique à balayage
Mosquées -- Turquie -- Conservation et restauration
Peinture à fresque -- Empire ottoman -- Technique
Peinture et décoration murales -- Empire ottoman -- Conservation et restauration
Peinture et décoration murales -- Empire ottoman -- Technique
Peinture et décoration murales -- Matériaux -- Analyse
Spectroscopie des rayons X
Spectroscopie RamanMots-clés : Kalem işi Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Decorative wall paintings created in the Ottoman era are called kalem işi, and they are generally created using various pigments and binding media on dry rendering, or via lime-paint technique. However, detection of some decorative wall paintings that were applied on wet plaster in Süleyman Pasha Mosque located in Edirne, Turkey, has led to a more detailed analytical examination. Our study aims to research the techniques used on some painting fragments which were found while removing cement renderings during the restoration of the Mosque. The fragments were revealed in 2019 and were taken under protection as these were stylistically different from the existing paintings of the Mosque. The original location of the fragments on the wall could not be located and in situ conservation is not possible, but research continues. Initially, traces of preparatory drawing, which is thought to be the incising technique, were found on the paintings drawn on the rendering fragments. Then, SEM-EDX, FTIR spectroscopy, confocal Raman spectroscopy, and PED-XRF analyses were carried out along with examinations by optical microscopy. Following these results, experimental reconstructions of the paintings were made on test materials and a story about the painting techniques was revealed, indicating that these paintings were drawn on wet rendering (fresco). Therefore, it is considered that there may be different wall painting techniques in Ottoman architecture and that research in this direction should be increased.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 418-431[article] Investigations of Painting Techniques : Edirne Süleyman Pasha Mosque Wall Paintings [texte imprimé] . - 2023 . - Pages 418-431.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 418-431
Catégories : Edirne (Turquie) -- Selimiye camisi
Fourier, Spectroscopie infrarouge à transformée de
Microscopie électronique à balayage
Mosquées -- Turquie -- Conservation et restauration
Peinture à fresque -- Empire ottoman -- Technique
Peinture et décoration murales -- Empire ottoman -- Conservation et restauration
Peinture et décoration murales -- Empire ottoman -- Technique
Peinture et décoration murales -- Matériaux -- Analyse
Spectroscopie des rayons X
Spectroscopie RamanMots-clés : Kalem işi Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Decorative wall paintings created in the Ottoman era are called kalem işi, and they are generally created using various pigments and binding media on dry rendering, or via lime-paint technique. However, detection of some decorative wall paintings that were applied on wet plaster in Süleyman Pasha Mosque located in Edirne, Turkey, has led to a more detailed analytical examination. Our study aims to research the techniques used on some painting fragments which were found while removing cement renderings during the restoration of the Mosque. The fragments were revealed in 2019 and were taken under protection as these were stylistically different from the existing paintings of the Mosque. The original location of the fragments on the wall could not be located and in situ conservation is not possible, but research continues. Initially, traces of preparatory drawing, which is thought to be the incising technique, were found on the paintings drawn on the rendering fragments. Then, SEM-EDX, FTIR spectroscopy, confocal Raman spectroscopy, and PED-XRF analyses were carried out along with examinations by optical microscopy. Following these results, experimental reconstructions of the paintings were made on test materials and a story about the painting techniques was revealed, indicating that these paintings were drawn on wet rendering (fresco). Therefore, it is considered that there may be different wall painting techniques in Ottoman architecture and that research in this direction should be increased.
Titre : An Example of Integrated Geological Survey of Geomaterials and their Weathering Forms : the Reggia di Caserta Main Façade Type de document : texte imprimé Année de publication : 2023 Article en page(s) : Pages 432-444 Langues : Anglais (eng) Catégories : Caserte (Italie) -- Palazzo reale
Constructions -- Effets des agents atmosphériques
Constructions -- Protection
Façades -- Italie -- 18e siècle -- Conservation et restauration
Façades -- Italie -- 18e siècle -- Déterioration -- Dessins et plans
Géomatériaux -- Détérioration
Palais -- Italie -- 18e siècle -- Conservation et restauration
Paragenèse (géologie)
PétrologieIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
This paper reports a detailed study on some relevant portions of the main façades of Caserta Royal Palace (Reggia di Caserta), one of the most important Italian monuments, comparable for its impressive architecture to the Royal Palace of Versailles in France and considered the largest royal palace in the world by volume. The research was focused on the weathering pathologies affecting the stone surfaces that, in the last decades, suffered several detachments of fragments from the coatings and from other architectural elements such as string courses, eaves, and capitals. A preliminary characterization of the materials of the façades and an evaluation of the relative weathering pathologies provided the information required for appropriate restoration and securing of these portions of the building. In particular, an innovative evaluation procedure which draws on techniques typical of the earth sciences allowed the proposal of a ‘risk attitude’ applied to discrete portions of the geomaterials used in the built heritage which is based on the influence of different factors leading to weakening of the stone and to the final detachment of rock fragments. Such a large and complete set of information should be carefully considered by the project planners to adopt the required steps for a suitable risk mitigation and for securing the site during restoration.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 432-444[article] An Example of Integrated Geological Survey of Geomaterials and their Weathering Forms : the Reggia di Caserta Main Façade [texte imprimé] . - 2023 . - Pages 432-444.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 432-444
Catégories : Caserte (Italie) -- Palazzo reale
Constructions -- Effets des agents atmosphériques
Constructions -- Protection
Façades -- Italie -- 18e siècle -- Conservation et restauration
Façades -- Italie -- 18e siècle -- Déterioration -- Dessins et plans
Géomatériaux -- Détérioration
Palais -- Italie -- 18e siècle -- Conservation et restauration
Paragenèse (géologie)
PétrologieIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
This paper reports a detailed study on some relevant portions of the main façades of Caserta Royal Palace (Reggia di Caserta), one of the most important Italian monuments, comparable for its impressive architecture to the Royal Palace of Versailles in France and considered the largest royal palace in the world by volume. The research was focused on the weathering pathologies affecting the stone surfaces that, in the last decades, suffered several detachments of fragments from the coatings and from other architectural elements such as string courses, eaves, and capitals. A preliminary characterization of the materials of the façades and an evaluation of the relative weathering pathologies provided the information required for appropriate restoration and securing of these portions of the building. In particular, an innovative evaluation procedure which draws on techniques typical of the earth sciences allowed the proposal of a ‘risk attitude’ applied to discrete portions of the geomaterials used in the built heritage which is based on the influence of different factors leading to weakening of the stone and to the final detachment of rock fragments. Such a large and complete set of information should be carefully considered by the project planners to adopt the required steps for a suitable risk mitigation and for securing the site during restoration.
Titre : Evaluation of Degradation of Japanese Hanging Scrolls Using Relative Peak Area of Volatile Organic Compounds Type de document : texte imprimé Année de publication : 2023 Langues : Anglais (eng) Catégories : Chromatographie en phase gazeuse
Composés organiques volatils -- Analyse
Essais accélérés (technologie)
Microextraction en phase solide
Papier -- Japon -- Détérioration
Peinture sur rouleau -- Japon -- Conservation et restauration
Peinture sur rouleau -- Japon -- Détérioration -- Méthode comparativeIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Volatile organic compounds (VOCs) generated from naturally aged Japanese hanging scrolls and their model samples were measured using solid-phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS) to clarify the effect of different painting papers and raw materials on the degradation state of hanging scrolls. VOC-based degradation markers were identified and their applicability was considered for degradation evaluations of actual Japanese hanging scrolls. The relative peak areas of different VOC groups were calculated by normalising their peak areas to the total peak area of long-chain hydrocarbons. When a painting paper was immersed in a CuSO4・5H2O solution, or coated with an alum solution, the relative peak areas of furfural and carboxylic acids increased after accelerated ageing, while these relative peak areas decreased when animal glue was applied, indicating that animal glue inhibited the generation of VOCs. When the painting paper containing Cu2+ was stacked with lining paper, furfural and carboxylic acids migrated into the lining paper with ageing. Animal glue coated on the painting paper retarded this migration into the lining paper. For the lining paper coated with wheat starch paste, the relative peak areas of furfural, carboxylic acids, and aliphatic aldehydes did not change significantly with ageing, indicating that wheat starch paste did not contribute to paper degradation, although these relative peak areas increased when aged wheat starch paste was applied. These results indicate that the targeted VOCs are valid degradation markers of Japanese hanging scrolls.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03)[article] Evaluation of Degradation of Japanese Hanging Scrolls Using Relative Peak Area of Volatile Organic Compounds [texte imprimé] . - 2023.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03)
Catégories : Chromatographie en phase gazeuse
Composés organiques volatils -- Analyse
Essais accélérés (technologie)
Microextraction en phase solide
Papier -- Japon -- Détérioration
Peinture sur rouleau -- Japon -- Conservation et restauration
Peinture sur rouleau -- Japon -- Détérioration -- Méthode comparativeIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Volatile organic compounds (VOCs) generated from naturally aged Japanese hanging scrolls and their model samples were measured using solid-phase microextraction-gas chromatography-mass spectrometry (SPME-GC-MS) to clarify the effect of different painting papers and raw materials on the degradation state of hanging scrolls. VOC-based degradation markers were identified and their applicability was considered for degradation evaluations of actual Japanese hanging scrolls. The relative peak areas of different VOC groups were calculated by normalising their peak areas to the total peak area of long-chain hydrocarbons. When a painting paper was immersed in a CuSO4・5H2O solution, or coated with an alum solution, the relative peak areas of furfural and carboxylic acids increased after accelerated ageing, while these relative peak areas decreased when animal glue was applied, indicating that animal glue inhibited the generation of VOCs. When the painting paper containing Cu2+ was stacked with lining paper, furfural and carboxylic acids migrated into the lining paper with ageing. Animal glue coated on the painting paper retarded this migration into the lining paper. For the lining paper coated with wheat starch paste, the relative peak areas of furfural, carboxylic acids, and aliphatic aldehydes did not change significantly with ageing, indicating that wheat starch paste did not contribute to paper degradation, although these relative peak areas increased when aged wheat starch paste was applied. These results indicate that the targeted VOCs are valid degradation markers of Japanese hanging scrolls.
Titre : The Permeability of PET by Formic and Acetic Acid Vapors Type de document : texte imprimé Année de publication : 2023 Article en page(s) : Pages 458-473 Langues : Anglais (eng) Catégories : Acide acétique
Conservation et restauration -- Appareils et matériel
Encapsulation (chimie)
Formique, Acide
Papier -- Conservation et restauration -- Recherche
Polyéthylène térephtalate -- Perméabilité
Revêtement en plastique -- Perméabilité
Vapeur, Technique de laIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
The permeability of biaxially oriented polyethylene terephthalate, PET, to vapors from 5%, 30%, and 100% formic acid solutions as well as the vapor from a 30% acetic acid solution was measured by gravimetric analysis in order to determine the transmission rate of the vapors through PET folders and enclosures made from Mylar™ and similar materials, and ultimately understand the microenvironment that is created inside an encapsulate. The data shows that the permeation of formic acid vapor is at least two orders of magnitude slower than the permeation of water vapor. Measurements of the permeation of 30% acetic acid vapor through PET seemed to be due to the permeation of the water only, and the permeation of the acetic acid, if it occurred, occurred too slowly to be measured. The size of the diffusing molecule determines the permeation. Since the permeability decreases as the size of the diffusing vapor molecule increases, a plot of permeability versus vapor size allows the permeability of various other vapors through PET to be predicted. Colorimetry showed that porous PET allowed ambient vapors to diffuse into the encapsulate, and the entire paper within the encapsulate was affected, not only the paper near the holes in the PET.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 458-473[article] The Permeability of PET by Formic and Acetic Acid Vapors [texte imprimé] . - 2023 . - Pages 458-473.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 458-473
Catégories : Acide acétique
Conservation et restauration -- Appareils et matériel
Encapsulation (chimie)
Formique, Acide
Papier -- Conservation et restauration -- Recherche
Polyéthylène térephtalate -- Perméabilité
Revêtement en plastique -- Perméabilité
Vapeur, Technique de laIndex. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
The permeability of biaxially oriented polyethylene terephthalate, PET, to vapors from 5%, 30%, and 100% formic acid solutions as well as the vapor from a 30% acetic acid solution was measured by gravimetric analysis in order to determine the transmission rate of the vapors through PET folders and enclosures made from Mylar™ and similar materials, and ultimately understand the microenvironment that is created inside an encapsulate. The data shows that the permeation of formic acid vapor is at least two orders of magnitude slower than the permeation of water vapor. Measurements of the permeation of 30% acetic acid vapor through PET seemed to be due to the permeation of the water only, and the permeation of the acetic acid, if it occurred, occurred too slowly to be measured. The size of the diffusing molecule determines the permeation. Since the permeability decreases as the size of the diffusing vapor molecule increases, a plot of permeability versus vapor size allows the permeability of various other vapors through PET to be predicted. Colorimetry showed that porous PET allowed ambient vapors to diffuse into the encapsulate, and the entire paper within the encapsulate was affected, not only the paper near the holes in the PET.
Titre : A Digital Study of the Morphological and Stability Issues of a Delicate Wax-based Artwork Type de document : texte imprimé Année de publication : 2023 Article en page(s) : Pages 474-489 Langues : Anglais (eng) Catégories : Art -- Matériaux -- 20e siècle -- Conservation et restauration
Imagerie tridimensionnelle -- Dans l'art
Modélisation tridimensionnelle
Pappas, Yannis (1913-2005)
Sculpture en cire -- 20e siècle -- Conservation et restauration
Sculpture en cire -- 20e siècle -- DéteriorationMots-clés : Xénophanes Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Xenophanes is a figurine made of a waxy mixture and grey plasticine, created by Yannis Pappas at the end of the twentieth century. During its short period of existence, the figurine presented severe plastic deformation, structural, and stability issues, with detached or missing elements. The artwork’s earlier preserved states are documented by an archival photograph of 1994 and two casts dated to 2005. The physical treatment of its deformation is an irreversible intervention that may put the artwork in additional danger. The conservation of complex contemporary artworks comprises a challenging field of work, as the coexistence and aging of different and often pliable materials lead to multiple deformations. Their conservation treatments could be kept to a minimum for the preservation and understanding of the artworks, with the support of three-dimensional (3D) documentation and digital restoration. A digital restoration that simulates the physical treatment of an artwork aims to provide information that could assist with decisions made for its physical care by minimizing the risks. This paper examines the digital restoration of the small figurine Xenophanes following the steps of increased intervention of a probable physical treatment and how each step of this process may affect its stability. 3D documentation of the current condition of the artwork and its two casts was made utilizing optical laser scanning and structure from motion photogrammetry. The resulting 3D models facilitated the digital restoration of the artwork to its earlier states. The comparison and analysis of the 3D models and the digital restoration process provided information that could assist its physical treatment. The digital restoration of the complex plastic deformation of an artwork is a case that, to our knowledge, has not been addressed so far. The complexity of the progress, the ethical dilemmas that arise during the artwork’s restoration, and the reflection on the restoration of a cultural artifact only in the digital environment encourage the rethinking of conservation.
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 474-489[article] A Digital Study of the Morphological and Stability Issues of a Delicate Wax-based Artwork [texte imprimé] . - 2023 . - Pages 474-489.
Langues : Anglais (eng)
in Studies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 474-489
Catégories : Art -- Matériaux -- 20e siècle -- Conservation et restauration
Imagerie tridimensionnelle -- Dans l'art
Modélisation tridimensionnelle
Pappas, Yannis (1913-2005)
Sculpture en cire -- 20e siècle -- Conservation et restauration
Sculpture en cire -- 20e siècle -- DéteriorationMots-clés : Xénophanes Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : ABSTRACT
Xenophanes is a figurine made of a waxy mixture and grey plasticine, created by Yannis Pappas at the end of the twentieth century. During its short period of existence, the figurine presented severe plastic deformation, structural, and stability issues, with detached or missing elements. The artwork’s earlier preserved states are documented by an archival photograph of 1994 and two casts dated to 2005. The physical treatment of its deformation is an irreversible intervention that may put the artwork in additional danger. The conservation of complex contemporary artworks comprises a challenging field of work, as the coexistence and aging of different and often pliable materials lead to multiple deformations. Their conservation treatments could be kept to a minimum for the preservation and understanding of the artworks, with the support of three-dimensional (3D) documentation and digital restoration. A digital restoration that simulates the physical treatment of an artwork aims to provide information that could assist with decisions made for its physical care by minimizing the risks. This paper examines the digital restoration of the small figurine Xenophanes following the steps of increased intervention of a probable physical treatment and how each step of this process may affect its stability. 3D documentation of the current condition of the artwork and its two casts was made utilizing optical laser scanning and structure from motion photogrammetry. The resulting 3D models facilitated the digital restoration of the artwork to its earlier states. The comparison and analysis of the 3D models and the digital restoration process provided information that could assist its physical treatment. The digital restoration of the complex plastic deformation of an artwork is a case that, to our knowledge, has not been addressed so far. The complexity of the progress, the ethical dilemmas that arise during the artwork’s restoration, and the reflection on the restoration of a cultural artifact only in the digital environment encourage the rethinking of conservation.
