Altérations des coquilles nacrées en milieu archéologique : le cas de la collection de Baye / Anne-Lise Marsolat in Conservation restauration des biens culturels (CRBC), no.28(2010) (2010-12-01)

Public ISBD [article]  inConservation restauration des biens culturels (CRBC) > no.28(2010) (2010-12-01) . - P. 45-52 Titre : Altérations des coquilles nacrées en milieu archéologique : le cas de la collection de Baye Type de document : texte imprimé Auteurs : Anne-Lise Marsolat, Auteur Année de publication : 2010 Article en page(s) : P. 45-52 Langues : Français (fre) Catégories : Baye, Joseph de (1853-1931) -- Collections archéologiques Coquillages -- Archéologie -- France -- 21e siècle Coquillages -- Collectionneurs et collections Coquillages -- Conservation et restauration Microscopie électronique à balayage Nacre -- Conservation et restauration Nacre -- Déterioration Index. décimale : 7.025 Dommages. Conservation. Protection [article] Altérations des coquilles nacrées en milieu archéologique : le cas de la collection de Baye [texte imprimé] / Anne-Lise Marsolat, Auteur . - 2010 . - P. 45-52. Langues : Français (fre) in Conservation restauration des biens culturels (CRBC) > no.28(2010) (2010-12-01) . - P. 45-52 Catégories : Baye, Joseph de (1853-1931) -- Collections archéologiques Coquillages -- Archéologie -- France -- 21e siècle Coquillages -- Collectionneurs et collections Coquillages -- Conservation et restauration Microscopie électronique à balayage Nacre -- Conservation et restauration Nacre -- Déterioration Index. décimale : 7.025 Dommages. Conservation. Protection

Bref aperçu morphologiques de l'altération des verres archéologiques / Cécile Macquet in Conservation restauration des biens culturels (CRBC), no.5(1993:oct.) (1993-10-01)

Public ISBD [article]  inConservation restauration des biens culturels (CRBC) > no.5(1993:oct.) (1993-10-01) . - P. 72-75 Titre : Bref aperçu morphologiques de l'altération des verres archéologiques : junior Type de document : texte imprimé Auteurs : Cécile Macquet, Auteur Année de publication : 1993 Article en page(s) : P. 72-75 Note générale : Fig. Langues : Français (fre) Catégories : Microscopie électronique à balayage Verrerie antique -- Conservation et restauration Index. décimale : 7.025 Dommages. Conservation. Protection [article] Bref aperçu morphologiques de l'altération des verres archéologiques : junior [texte imprimé] / Cécile Macquet, Auteur . - 1993 . - P. 72-75. Fig. Langues : Français (fre) in Conservation restauration des biens culturels (CRBC) > no.5(1993:oct.) (1993-10-01) . - P. 72-75 Catégories : Microscopie électronique à balayage Verrerie antique -- Conservation et restauration Index. décimale : 7.025 Dommages. Conservation. Protection

Carré de pollen de Wolfgang Laib : un cas représentatif de la spécificité de la conservation d'art contemporain / Sandrine Jalot in Conservation restauration des biens culturels (CRBC), no.16(2000:déc.) (2000-12-01)

Public ISBD [article]  inConservation restauration des biens culturels (CRBC) > no.16(2000:déc.) (2000-12-01) . - P. 12-19 Titre : Carré de pollen de Wolfgang Laib : un cas représentatif de la spécificité de la conservation d'art contemporain : dossier : patrimoine contemporain Type de document : texte imprimé Auteurs : Sandrine Jalot, Auteur Année de publication : 2000 Article en page(s) : P. 12-19 Langues : Français (fre) Catégories : Installations (art) -- 20e siècle -- Conservation et restauration Laib, Wolfgang (1950-....). Carré de pollen Land art -- Allemagne -- 20e siècle Microscopie électronique à balayage Plantes (matériau d'artistes) -- 20e siècle -- Analyse Plantes (matériau d'artistes) -- 20e siècle -- Détérioration Pollen -- Morphologie (biologie) Index. décimale : 7.025 Dommages. Conservation. Protection Note de contenu : Ill. en noir et en coul. [article] Carré de pollen de Wolfgang Laib : un cas représentatif de la spécificité de la conservation d'art contemporain : dossier : patrimoine contemporain [texte imprimé] / Sandrine Jalot, Auteur . - 2000 . - P. 12-19. Langues : Français (fre) in Conservation restauration des biens culturels (CRBC) > no.16(2000:déc.) (2000-12-01) . - P. 12-19 Catégories : Installations (art) -- 20e siècle -- Conservation et restauration Laib, Wolfgang (1950-....). Carré de pollen Land art -- Allemagne -- 20e siècle Microscopie électronique à balayage Plantes (matériau d'artistes) -- 20e siècle -- Analyse Plantes (matériau d'artistes) -- 20e siècle -- Détérioration Pollen -- Morphologie (biologie) Index. décimale : 7.025 Dommages. Conservation. Protection Note de contenu : Ill. en noir et en coul.

Colors, Materials, and Techniques in Historical Buildings in Rome : Diagnostic Investigations and Case Studies in Studies in conservation, Vol.68 N°3-4(2023; April-May) (2023-04-03)

Public ISBD [article]  inStudies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 365-379 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 Stratigraphie Index. 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. [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 Stratigraphie Index. 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.

Conservation of the Shaft #1 Headgear at the Tsumeb Mine, Namibia in Studies in conservation, Vol.68 N°1-2(2023; January-February) (2023-01-01)

Public ISBD [article]  inStudies in conservation > Vol.68 N°1-2(2023; January-February) (2023-01-01) . - P. 228-242 Titre : Conservation of the Shaft #1 Headgear at the Tsumeb Mine, Namibia : Corrosion Protection Type de document : texte imprimé Année de publication : 2023 Article en page(s) : P. 228-242 Note générale : Article en libre accès (open access). https://www.tandfonline.com/doi/full/10.1080/00393630.2021.2004007 Langues : Anglais (eng) Catégories : Acier -- Composition chimique Acier de construction -- Corrosion -- Analyse Acier de construction -- Corrosion -- Mesure Anticorrosifs -- Conservation et restauration Assemblages à rivets -- Afrique du Sud-Ouest -- 20e siècle Constructions métalliques -- Afrique du Sud-Ouest -- 20e siècle -- Corrosion Constructions métalliques -- Afrique du Sud-Ouest -- Effets du climat Microscopie électronique à balayage Mines (sites d'extraction) -- Namibie -- Conservation et restauration Patrimoine industriel -- Namibie -- Protection Résines alkydes Spectroscopie des rayons X Stabilisants -- Conservation et restauration Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : The Tsumeb Mine in Namibia represents one of the best-preserved mining sites in the world and is rapidly gaining cross-disciplinary interest among cultural and engineering scientists. Most of the open pit and the shaft mining equipment are still in place, including the ore processing units and the local power plant. The mining area thus deserves recognition as an industrial world heritage site, especially due to the rarity of such locations on the African continent. The Shaft #1 headgear, built in 1924, represents one of the oldest known riveted steel headgears of the Promnitz design worldwide. In contrast to similar steel structures located in the northern hemisphere, it has been exposed to a different rural semi-arid climate since it is located in the Otavi Mountain Land, characterized by semi-annual change of rainy and dry seasons. Parts of the Shaft #1 headgear have remained largely untouched for more than 70 years. Besides its outstanding heritage value, it thus also represents an interesting object for studying the composition of corrosion layers formed on mild steel surfaces when exposed to continental and industrial mining atmospheres. To find a suitable transparent corrosion prevention coating, various on-site coating samples were evaluated after 11 months of outdoor exposure, including Owatrol Oil®, which is based on natural oil and alkyd resin with strong wicking potential. The substance is frequently applied for the conservation of single components but is not yet widely used on large steel structures in the field of industrial heritage conservation. However, it represented the most stable anti-corrosion coating under the local atmospheric conditions in the on-site tests. Thus, the suitability of Owatrol Oil® as a transparent coating for corrosion protection of riveted mild steel structures in such climates was further investigated as a more recent approach for the conservation of large steel structures. Since the protective coatings are exposed to strong UV radiation in the local climate, the addition of a specific UV stabilizer mixture was also tested. For such laboratory tests, two mild steel samples were taken. The first one originated from a diagonal strut of the 1920s and the second one from a handrail mounted in the early 1960s. Using corresponding high-resolution scanning electron microscopy (HR-SEM) and energy-dispersive X-ray spectroscopy (EDX) it was found that the corrosion layers are predominantly composed of lepidocrocite and goethite. A weathering program simulating the specific environmental conditions at Tsumeb in a UV climate chamber was developed and the corrosion resistance of the mild steel surface was subsequently evaluated by potentiodynamic measurements. Such tests proved to be a fast and reliable procedure for ranking the corrosion resistance of the old mild steels. It was found that the long-term corrosion layers already provide significant protection against further corrosion in the simulated environment. However, the study also showed that this can be further improved by the application of the Owatrol Oil® as a protective coating that also seals crevices. The addition of the UV stabilizers, however, led to a significant deterioration in corrosion protection, even in comparison to that of the uncoated long-term corrosion layers on the surface. Regular overcoating seems more advisable for the long-term preservation of the Shaft #1 headgear than modifying the Owatrol Oil® coating with the tested UV-stabilizing additives. [article] Conservation of the Shaft #1 Headgear at the Tsumeb Mine, Namibia : Corrosion Protection [texte imprimé] . - 2023 . - P. 228-242. Article en libre accès (open access). https://www.tandfonline.com/doi/full/10.1080/00393630.2021.2004007 Langues : Anglais (eng) in Studies in conservation > Vol.68 N°1-2(2023; January-February) (2023-01-01) . - P. 228-242 Catégories : Acier -- Composition chimique Acier de construction -- Corrosion -- Analyse Acier de construction -- Corrosion -- Mesure Anticorrosifs -- Conservation et restauration Assemblages à rivets -- Afrique du Sud-Ouest -- 20e siècle Constructions métalliques -- Afrique du Sud-Ouest -- 20e siècle -- Corrosion Constructions métalliques -- Afrique du Sud-Ouest -- Effets du climat Microscopie électronique à balayage Mines (sites d'extraction) -- Namibie -- Conservation et restauration Patrimoine industriel -- Namibie -- Protection Résines alkydes Spectroscopie des rayons X Stabilisants -- Conservation et restauration Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : The Tsumeb Mine in Namibia represents one of the best-preserved mining sites in the world and is rapidly gaining cross-disciplinary interest among cultural and engineering scientists. Most of the open pit and the shaft mining equipment are still in place, including the ore processing units and the local power plant. The mining area thus deserves recognition as an industrial world heritage site, especially due to the rarity of such locations on the African continent. The Shaft #1 headgear, built in 1924, represents one of the oldest known riveted steel headgears of the Promnitz design worldwide. In contrast to similar steel structures located in the northern hemisphere, it has been exposed to a different rural semi-arid climate since it is located in the Otavi Mountain Land, characterized by semi-annual change of rainy and dry seasons. Parts of the Shaft #1 headgear have remained largely untouched for more than 70 years. Besides its outstanding heritage value, it thus also represents an interesting object for studying the composition of corrosion layers formed on mild steel surfaces when exposed to continental and industrial mining atmospheres. To find a suitable transparent corrosion prevention coating, various on-site coating samples were evaluated after 11 months of outdoor exposure, including Owatrol Oil®, which is based on natural oil and alkyd resin with strong wicking potential. The substance is frequently applied for the conservation of single components but is not yet widely used on large steel structures in the field of industrial heritage conservation. However, it represented the most stable anti-corrosion coating under the local atmospheric conditions in the on-site tests. Thus, the suitability of Owatrol Oil® as a transparent coating for corrosion protection of riveted mild steel structures in such climates was further investigated as a more recent approach for the conservation of large steel structures. Since the protective coatings are exposed to strong UV radiation in the local climate, the addition of a specific UV stabilizer mixture was also tested. For such laboratory tests, two mild steel samples were taken. The first one originated from a diagonal strut of the 1920s and the second one from a handrail mounted in the early 1960s. Using corresponding high-resolution scanning electron microscopy (HR-SEM) and energy-dispersive X-ray spectroscopy (EDX) it was found that the corrosion layers are predominantly composed of lepidocrocite and goethite. A weathering program simulating the specific environmental conditions at Tsumeb in a UV climate chamber was developed and the corrosion resistance of the mild steel surface was subsequently evaluated by potentiodynamic measurements. Such tests proved to be a fast and reliable procedure for ranking the corrosion resistance of the old mild steels. It was found that the long-term corrosion layers already provide significant protection against further corrosion in the simulated environment. However, the study also showed that this can be further improved by the application of the Owatrol Oil® as a protective coating that also seals crevices. The addition of the UV stabilizers, however, led to a significant deterioration in corrosion protection, even in comparison to that of the uncoated long-term corrosion layers on the surface. Regular overcoating seems more advisable for the long-term preservation of the Shaft #1 headgear than modifying the Owatrol Oil® coating with the tested UV-stabilizing additives.

Conservation of Tortoise Shell Using Hydroxyapatite / Collagen as a Consolidation Material in Studies in conservation, Vol.68 N°3-4(2023; April-May) (2023-04-03)

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L'étamage des objets ferreux archéologiques : une présence discrète et problématique / Manuel Leroux ; Stéphane Lemoine in Conservation restauration des biens culturels (CRBC), no.21(2003) (2003-12-01)

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Les gommes à effacer utilisées en conservation-restauration des photographies / Emmanuelle Grosso in Conservation restauration des biens culturels (CRBC), no.8(1996:oct.) (1996-10-01)

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La gouache blanche sur les dessins de Charles Jacqueau : analyse et restauration / Anna Gabrielli ; Floréal Daniel in Conservation restauration des biens culturels (CRBC), no.19/20(2002:déc.) (2002-12-01)

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Histoire d'une hache à douille de l'Âge de Bronze ou une autre vision de la corrosion des bronzes archéologiques / Luc Robbiola in Conservation restauration des biens culturels (CRBC), no.6(1994:déc.) (1994-12-01)

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Instruments scientifiques : conservation-restauration d'un théodolite de la fin du XIXe siècle / Anne-Marie Geffroy in Conservation restauration des biens culturels (CRBC), no.23(2005) (2005-12-01)

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Investigations of Painting Techniques : Edirne Süleyman Pasha Mosque Wall Paintings in Studies in conservation, Vol.68 N°3-4(2023; April-May) (2023-04-03)

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Microstratigraphic Research of Altered Medieval Painted Plaster Fragments from the St John Monastery in Müstair (Grison Canton, Switzerland) in Studies in conservation, Vol.68 N°3-4(2023; April-May) (2023-04-03)

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Preventive Conservation, Treatment, and Technical Study of Plasticized Poly(vinyl chloride) Multiples by Joseph Beuys / Nicole Ledoux in Studies in conservation, Vol.68 N°3-4(2023; April-May) (2023-04-03)  

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Recent development in cleaning research : surface characterisation studies / Aviva Burnstock in Conservation restauration des biens culturels (CRBC), no.3(1991:déc.) (1991-12-01)

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