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)

Public ISBD [article]  inConservation restauration des biens culturels (CRBC) > no.23(2005) (2005-12-01) . - P. 57-61 Titre : Instruments scientifiques : conservation-restauration d'un théodolite de la fin du XIXe siècle : études de cas Type de document : texte imprimé Auteurs : Anne-Marie Geffroy, Auteur Année de publication : 2005 Article en page(s) : P. 57-61 Langues : Français (fre) Catégories : Alliages -- 19e siècle -- Analyse Chromatographie en phase gazeuse Diffractomètres de rayons X Métaux -- Analyse Métaux -- Corrosion Microscopie électronique à balayage Musée des arts et métiers (Paris) Spectrométrie de masse Spectroscopie de fluorescence Théodolites -- 19e siècle -- Dessins et plans Topographie -- Instruments -- 19e siècle -- Conservation et restauration Index. décimale : 7.025 Dommages. Conservation. Protection [article] Instruments scientifiques : conservation-restauration d'un théodolite de la fin du XIXe siècle : études de cas [texte imprimé] / Anne-Marie Geffroy, Auteur . - 2005 . - P. 57-61. Langues : Français (fre) in Conservation restauration des biens culturels (CRBC) > no.23(2005) (2005-12-01) . - P. 57-61 Catégories : Alliages -- 19e siècle -- Analyse Chromatographie en phase gazeuse Diffractomètres de rayons X Métaux -- Analyse Métaux -- Corrosion Microscopie électronique à balayage Musée des arts et métiers (Paris) Spectrométrie de masse Spectroscopie de fluorescence Théodolites -- 19e siècle -- Dessins et plans Topographie -- Instruments -- 19e siècle -- Conservation et restauration Index. décimale : 7.025 Dommages. Conservation. Protection

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)  

Public ISBD [article]  inStudies in conservation > Vol.68 N°3-4(2023; April-May) (2023-04-03) . - Pages 343-356 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 X Index. 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 [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 X Index. 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

La problématique générale de l'analyse des substances organiques des polychromies dans l'art monumental / Witold Nowik in Conservation restauration des biens culturels (CRBC), no.17/18(2001:déc.) (2001-12-01)

Public ISBD [article]  inConservation restauration des biens culturels (CRBC) > no.17/18(2001:déc.) (2001-12-01) . - P. 33-42 Titre : La problématique générale de l'analyse des substances organiques des polychromies dans l'art monumental : recherche Type de document : texte imprimé Auteurs : Witold Nowik, Auteur Année de publication : 2001 Article en page(s) : P. 33-42 Langues : Français (fre) Catégories : Chromatographie Conservation et restauration -- Échantillonnage Conservation et restauration -- Méthodologie Couleur en décoration intérieure -- Recherche Électrophorèse Fluorescence Matériaux organiques -- Analyse Monuments historiques -- Conservation et restauration -- Recherche Peinture et décoration murales -- Matériaux -- Analyse Peinture et décoration murales -- Teneur en composés organiques Polychromie -- Recherche Spectrométrie de masse Spectroscopie de masse Spectroscopie infrarouge Spectroscopie Raman Index. décimale : 7.025 Dommages. Conservation. Protection [article] La problématique générale de l'analyse des substances organiques des polychromies dans l'art monumental : recherche [texte imprimé] / Witold Nowik, Auteur . - 2001 . - P. 33-42. Langues : Français (fre) in Conservation restauration des biens culturels (CRBC) > no.17/18(2001:déc.) (2001-12-01) . - P. 33-42 Catégories : Chromatographie Conservation et restauration -- Échantillonnage Conservation et restauration -- Méthodologie Couleur en décoration intérieure -- Recherche Électrophorèse Fluorescence Matériaux organiques -- Analyse Monuments historiques -- Conservation et restauration -- Recherche Peinture et décoration murales -- Matériaux -- Analyse Peinture et décoration murales -- Teneur en composés organiques Polychromie -- Recherche Spectrométrie de masse Spectroscopie de masse Spectroscopie infrarouge Spectroscopie Raman Index. décimale : 7.025 Dommages. Conservation. Protection

The Technical Analysis and Conservation of John La Farge’s Newport Congregational Church Mural Decorations (1880) in Newport, Rhode Island 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. 193-209 Titre : The Technical Analysis and Conservation of John La Farge’s Newport Congregational Church Mural Decorations (1880) in Newport, Rhode Island Type de document : texte imprimé Année de publication : 2023 Article en page(s) : P. 193-209 Langues : Anglais (eng) Catégories : Chromatographie en phase gazeuse Cire d'abeille -- Dans l'art -- 19e siècle -- Analyse Décoration intérieure -- Matériaux -- 19e siècle -- Analyse Décoration intérieure -- Matériaux -- 19e siècle -- Formules et recettes Détrempe (peinture) -- Analyse Église -- Newport (R.I., États-Unis) -- 19e siècle -- Conservation et restauration Fourier, Spectroscopie infrarouge à transformée de La Farge, John (1835-1910) Microscopie électronique à balayage Peinture et décoration murales -- Newport (R.I., États-Unis) -- 19e siècle -- Conservation et restauration Pigments -- 19e siècle -- Analyse Résines fossiles -- Dans l'art -- 19e siècle -- Analyse Spectrométrie de masse Spectroscopie des rayons X Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : John La Farge (1835–1910) is regarded as an innovator of American interior decoration. His materials and techniques successfully created unique and eye-catching effects across the interior surfaces of monumental buildings. The recent conservation treatment of the Newport Congregational Church in Newport, Rhode Island afforded the opportunity to perform the first comprehensive analysis of one such painted interior. Materials analyses of the media and pigments were carried out using Fourier transform infrared spectroscopy (FTIR), gas chromatography-mass spectrometry (GC-MS), and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX). In addition, reconstructions of La Farge’s medium were prepared based on a number of available archival paint recipes in order to further inform the analysis and to help develop a better understanding of the materials La Farge likely used for specific passages and colors. The results of the project suggest that La Farge primarily achieved his varied surfaces with two mediums: distemper-bound passages juxtaposed with areas bound in a mixture of beeswax and larch balsam diluted with solvents. Analysis, archival research, and reconstructions were ultimately used to illustrate the vulnerabilities of La Farge’s surfaces but also to reveal the artist’s original intent and technique. [article] The Technical Analysis and Conservation of John La Farge’s Newport Congregational Church Mural Decorations (1880) in Newport, Rhode Island [texte imprimé] . - 2023 . - P. 193-209. Langues : Anglais (eng) in Studies in conservation > Vol.68 N°1-2(2023; January-February) (2023-01-01) . - P. 193-209 Catégories : Chromatographie en phase gazeuse Cire d'abeille -- Dans l'art -- 19e siècle -- Analyse Décoration intérieure -- Matériaux -- 19e siècle -- Analyse Décoration intérieure -- Matériaux -- 19e siècle -- Formules et recettes Détrempe (peinture) -- Analyse Église -- Newport (R.I., États-Unis) -- 19e siècle -- Conservation et restauration Fourier, Spectroscopie infrarouge à transformée de La Farge, John (1835-1910) Microscopie électronique à balayage Peinture et décoration murales -- Newport (R.I., États-Unis) -- 19e siècle -- Conservation et restauration Pigments -- 19e siècle -- Analyse Résines fossiles -- Dans l'art -- 19e siècle -- Analyse Spectrométrie de masse Spectroscopie des rayons X Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : John La Farge (1835–1910) is regarded as an innovator of American interior decoration. His materials and techniques successfully created unique and eye-catching effects across the interior surfaces of monumental buildings. The recent conservation treatment of the Newport Congregational Church in Newport, Rhode Island afforded the opportunity to perform the first comprehensive analysis of one such painted interior. Materials analyses of the media and pigments were carried out using Fourier transform infrared spectroscopy (FTIR), gas chromatography-mass spectrometry (GC-MS), and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX). In addition, reconstructions of La Farge’s medium were prepared based on a number of available archival paint recipes in order to further inform the analysis and to help develop a better understanding of the materials La Farge likely used for specific passages and colors. The results of the project suggest that La Farge primarily achieved his varied surfaces with two mediums: distemper-bound passages juxtaposed with areas bound in a mixture of beeswax and larch balsam diluted with solvents. Analysis, archival research, and reconstructions were ultimately used to illustrate the vulnerabilities of La Farge’s surfaces but also to reveal the artist’s original intent and technique.

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