Les courbures locales, limites en fatigue d'un tableau soumis à des vibrations : l'usage des protection arrière / Chloé Genevaux in Conservation restauration des biens culturels (CRBC), no.25(2007) (2007-12-01)

Public ISBD [article]  inConservation restauration des biens culturels (CRBC) > no.25(2007) (2007-12-01) . - P. 37-44 Titre : Les courbures locales, limites en fatigue d'un tableau soumis à des vibrations : l'usage des protection arrière Type de document : texte imprimé Auteurs : Chloé Genevaux, Auteur Année de publication : 2007 Article en page(s) : P. 37-44 Langues : Français (fre) Catégories : Contraintes (mécanique) Matériaux -- Fissuration Peinture -- Conservation et restauration Peinture sur toile -- Protection Réponse en fréquence Résistance des matériaux Vibrations -- Analyse Index. décimale : 7.025 Dommages. Conservation. Protection Note de contenu : Fig. [article] Les courbures locales, limites en fatigue d'un tableau soumis à des vibrations : l'usage des protection arrière [texte imprimé] / Chloé Genevaux, Auteur . - 2007 . - P. 37-44. Langues : Français (fre) in Conservation restauration des biens culturels (CRBC) > no.25(2007) (2007-12-01) . - P. 37-44 Catégories : Contraintes (mécanique) Matériaux -- Fissuration Peinture -- Conservation et restauration Peinture sur toile -- Protection Réponse en fréquence Résistance des matériaux Vibrations -- Analyse Index. décimale : 7.025 Dommages. Conservation. Protection Note de contenu : Fig.

Magnets in Conservation of Easel Paintings : Mechanical Forces between Magnets and a Thin Paint Layer / Zuzanna Szozda in Studies in conservation, Vol.70 N°5-6(2025; July-August) (2025-07-01)  

Public ISBD [article]  inStudies in conservation > Vol.70 N°5-6(2025; July-August) (2025-07-01) . - P. 417-437 Titre : Magnets in Conservation of Easel Paintings : Mechanical Forces between Magnets and a Thin Paint Layer Type de document : texte imprimé Auteurs : Zuzanna Szozda (19..-....), Auteur ; Stan Zurek (19..-....), Auteur Année de publication : 2025 Article en page(s) : P. 417-437 Note générale : Fig., tabl. Langues : Anglais (eng) Catégories : Aimants -- Physique -- Recherche Contraintes (mécanique) Déformations (mécanique) -- Recherche Matériaux -- Propriétés magnétiques Peinture -- Conservation et restauration Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : Abstract : This paper discusses the mechanical interactions between a magnet and a thin paint layer situated on a non-magnetic substrate, for example, to correct painting deformations or to fix pictorial layers. Crucial to calculating the attraction force F is knowing the magnetic susceptibility χ in the paint layer center XC and also the gradient dH/dx across the paint (calculated from magnetic fields H on both sides XS and XE of the layer). However, the susceptibility χ depends on the magnetic field H which is a function of the distance from the magnet’s pole: χ = f(H(XC)). It should be noted that as the magnet approaches the paint layer, the value of the field H(x) increases, but the susceptibility of the substance χ(H(x)) decreases. Analytical formulas and practical calculation schemes for mechanical forces in the discussed magnetic systems are presented in detail. As a result of the undertaken work, interactive on-line calculators for calculating magnetic fields and forces were developed and made available online. Reliable estimation of mechanical forces due to magnets, as presented here, allows for more controlled and reproducible conservation results. Therefore, the principle of minimal intervention and reversibility can be attained repeatably with greater ease, laying the groundwork for improved protocols. En ligne : https://www.tandfonline.com/doi/full/10.1080/00393630.2024.2429342 [article] Magnets in Conservation of Easel Paintings : Mechanical Forces between Magnets and a Thin Paint Layer [texte imprimé] / Zuzanna Szozda (19..-....), Auteur ; Stan Zurek (19..-....), Auteur . - 2025 . - P. 417-437. Fig., tabl. Langues : Anglais (eng) in Studies in conservation > Vol.70 N°5-6(2025; July-August) (2025-07-01) . - P. 417-437 Catégories : Aimants -- Physique -- Recherche Contraintes (mécanique) Déformations (mécanique) -- Recherche Matériaux -- Propriétés magnétiques Peinture -- Conservation et restauration Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : Abstract : This paper discusses the mechanical interactions between a magnet and a thin paint layer situated on a non-magnetic substrate, for example, to correct painting deformations or to fix pictorial layers. Crucial to calculating the attraction force F is knowing the magnetic susceptibility χ in the paint layer center XC and also the gradient dH/dx across the paint (calculated from magnetic fields H on both sides XS and XE of the layer). However, the susceptibility χ depends on the magnetic field H which is a function of the distance from the magnet’s pole: χ = f(H(XC)). It should be noted that as the magnet approaches the paint layer, the value of the field H(x) increases, but the susceptibility of the substance χ(H(x)) decreases. Analytical formulas and practical calculation schemes for mechanical forces in the discussed magnetic systems are presented in detail. As a result of the undertaken work, interactive on-line calculators for calculating magnetic fields and forces were developed and made available online. Reliable estimation of mechanical forces due to magnets, as presented here, allows for more controlled and reproducible conservation results. Therefore, the principle of minimal intervention and reversibility can be attained repeatably with greater ease, laying the groundwork for improved protocols. En ligne : https://www.tandfonline.com/doi/full/10.1080/00393630.2024.2429342

Material Selection for the Hydrophobic Cushion Layer Applied to Earthen Sites in Northwest China 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. 243-257 Titre : Material Selection for the Hydrophobic Cushion Layer Applied to Earthen Sites in Northwest China Type de document : texte imprimé Année de publication : 2023 Article en page(s) : P. 243-257 Langues : Anglais (eng) Catégories : Construction -- Matériaux -- Analyse Constructions -- Effets des agents atmosphériques Constructions en terre -- Chine (nord-ouest) -- Conservation et restauration Constructions en terre -- Chine (nord-ouest) -- Érosion Contraintes (mécanique) Huile de Toung Matériaux -- Couleur -- Altération Polymères vinyliques Sols -- Dégradation Surfaces hydrophobes Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : Earthen sites with important historical, cultural, artistic, social, and scientific values have been seriously damaged. Basal erosion, which is caused by soluble salts, water runoff, and sand-driving wind, is an extremely threatening erosion pattern for earthen sites. A cushion layer which has a damp-proofing function and good physical and mechanical properties can effectively decrease basal erosion. The primary aim of this study is to investigate material selection for the hydrophobic cushion layer for earthen sites in northwest China. The results indicate that cooked tung oil and sticky rice liquid, traditionally used in China, cannot meet the fundamental requirements of sufficient hydrophobicity for the cushion layer. Although polyvinyl alcohol (PVA) solution and tung oil exhibit similar properties in terms of soil hydrophobicity, water vapour permeability, water resistance, surface hardness, and colour difference for samples with 0.0-1.0% content, the PVA solution is significantly better than tung oil in unconfined compressive strength, deformation modulus, wave velocity, and viscosity. Therefore, the PVA solution should be preferentially selected as a hydrophobic cushion layer material according to the results of this work. When the mixing method is adopted, 0.6-1.0% PVA content is the best choice. [article] Material Selection for the Hydrophobic Cushion Layer Applied to Earthen Sites in Northwest China [texte imprimé] . - 2023 . - P. 243-257. Langues : Anglais (eng) in Studies in conservation > Vol.68 N°1-2(2023; January-February) (2023-01-01) . - P. 243-257 Catégories : Construction -- Matériaux -- Analyse Constructions -- Effets des agents atmosphériques Constructions en terre -- Chine (nord-ouest) -- Conservation et restauration Constructions en terre -- Chine (nord-ouest) -- Érosion Contraintes (mécanique) Huile de Toung Matériaux -- Couleur -- Altération Polymères vinyliques Sols -- Dégradation Surfaces hydrophobes Index. décimale : 7.025 Dommages. Conservation. Protection Résumé : Earthen sites with important historical, cultural, artistic, social, and scientific values have been seriously damaged. Basal erosion, which is caused by soluble salts, water runoff, and sand-driving wind, is an extremely threatening erosion pattern for earthen sites. A cushion layer which has a damp-proofing function and good physical and mechanical properties can effectively decrease basal erosion. The primary aim of this study is to investigate material selection for the hydrophobic cushion layer for earthen sites in northwest China. The results indicate that cooked tung oil and sticky rice liquid, traditionally used in China, cannot meet the fundamental requirements of sufficient hydrophobicity for the cushion layer. Although polyvinyl alcohol (PVA) solution and tung oil exhibit similar properties in terms of soil hydrophobicity, water vapour permeability, water resistance, surface hardness, and colour difference for samples with 0.0-1.0% content, the PVA solution is significantly better than tung oil in unconfined compressive strength, deformation modulus, wave velocity, and viscosity. Therefore, the PVA solution should be preferentially selected as a hydrophobic cushion layer material according to the results of this work. When the mixing method is adopted, 0.6-1.0% PVA content is the best choice.

Les photographies contemporaines montées sous Diasec : traitements des dommages de surface et conservation préventive / Bruno Le Namouric ; Bertrand Sainte-Marthe in Conservation restauration des biens culturels (CRBC), no.27(2009) (2009-12-01)

Public ISBD [article]  inConservation restauration des biens culturels (CRBC) > no.27(2009) (2009-12-01) . - P. 45-52 Titre : Les photographies contemporaines montées sous Diasec : traitements des dommages de surface et conservation préventive : recherche Type de document : texte imprimé Auteurs : Bruno Le Namouric, Auteur ; Bertrand Sainte-Marthe, Auteur Année de publication : 2009 Article en page(s) : P. 45-52 Langues : Français (fre) Catégories : Contraintes (mécanique) Masse (physique) -- Analyse Matériaux -- Analyse Matière -- Propriétés Photographie -- Appareils et matériel Photographie -- Conservation et restauration -- Recherche Plaques photographiques -- Conservation et restauration Polissage -- Essais Polyméthacrylate de méthyle Usure (mécanique) Index. décimale : 7.025 Dommages. Conservation. Protection Note de contenu : Fig. [article] Les photographies contemporaines montées sous Diasec : traitements des dommages de surface et conservation préventive : recherche [texte imprimé] / Bruno Le Namouric, Auteur ; Bertrand Sainte-Marthe, Auteur . - 2009 . - P. 45-52. Langues : Français (fre) in Conservation restauration des biens culturels (CRBC) > no.27(2009) (2009-12-01) . - P. 45-52 Catégories : Contraintes (mécanique) Masse (physique) -- Analyse Matériaux -- Analyse Matière -- Propriétés Photographie -- Appareils et matériel Photographie -- Conservation et restauration -- Recherche Plaques photographiques -- Conservation et restauration Polissage -- Essais Polyméthacrylate de méthyle Usure (mécanique) Index. décimale : 7.025 Dommages. Conservation. Protection Note de contenu : Fig.

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