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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

The room temperature evaporation behavior of purported azeotropes used as cleaning solutions in art conservation

Carrison, Megan Sara January 2014 (has links)
Indiana University-Purdue University Indianapolis (IUPUI) / Finely-tuned solvent mixtures are used by art conservators for the difficult task of safely and selectively removing yellowed varnish, disfiguring grime, and discolored overpaint from the surface of oil paintings. This process is often referred to as “picture cleaning” and depends on the different solubilities of the obfuscating surface materials and the underlying paint medium. However, differential evaporation rates for the solvents used in these carefully formulated cleaning mixtures can change the potency of the mixture over time, which could potentially lead to solutions having solubility characteristics that are ineffective at cleaning, or worse yet, are deleterious to artists’ oil paints. Azeotropic blends of solvents have been proposed as an alternative for maintaining consistent solvent composition throughout the evaporation process while benefiting from their high vapor pressure relative to the pure solvents. Azeotropes are specific combinations of two or more solvents at a precise concentration that behave as a single solvent, maintaining a constant composition in both the liquid and vapor phases. The use of purportedly azeotropic solvent blends has appeared in the art conservation literature for the cleaning of historic objects and paintings. However, these solvent mixtures are taken from tables of azeotropic compositions given at their boiling point. We have studied one of these solutions, a 19:81 vol% mixture of isopropanol and n-hexane. For the first time, the actual evaporation behavior of this purported azeotropic mixture was followed in detail at room temperature conditions. Through the use of rudimentary vapor pressure measurements, gravimetric analysis, as well as sophisticated compositional determinations of both the liquid phase and headspace of evaporating mixtures by gas chromatography, this particular cleaning solution has been shown to be zeotropic (i.e. NOT an azeotrope) under the conditions typical of conservation studios. The true room temperature azeotropic composition was found instead to contain half as much isopropanol at 9.5 vol%. Art conservators should therefore be dubious of purportedly azeotropic mixtures reported at boiling points well above room temperature. Individual azeotropic cleaning blends are best determined chemically prior to their use in art restoration. Furthermore, the introduction of a model paint film to the evaporating room temperature azeotrope was shown to further confound its behavior, calling into question whether solvent systems can be configured to evaporate with constant composition from the surface of an artwork.
22

Playing With Fire: An Examination of the Context and Conservation of Jose Clemente Orozco's Prometheus

Rodriguez, Abigail E 01 January 2016 (has links)
Tucked within Pomona College’s campus in Claremont, California, sits Frary Hall, the home of Mexican muralist Jose Clemente Orozco’s first work in the United States. The mural, titled Prometheus (1930), has been subjected to many instances of vandalism over the years. Thus, in 1980, a protective coating was applied. Today, the coating, a highly-reflective varnish, has been noted as a hindrance of the fresco’s original matte surface. Using case studies and art historical analysis, this thesis examines the importance of the mural within the history of Mexican muralism and the pros and cons of removing the protective coating. In addition, this research looks at the potential of art conservation as a means of reactivating the mural and promoting discussions across campus about the preservation of this cultural landmark. The thesis is culminated by a detailed proposal for the continued conservation of the mural, using Prometheus as a starting point for further discussions about aesthetics and ethics within the discourses of art history, art conservation and art restoration.
23

Syncretic Souvenirs: An Investigation of Two Modern Indian Manuscripts

Helland, Madeline 01 January 2018 (has links)
The objective of this project was to establish a provenance for two Indian manuscripts that were recently discovered in the collections at Scripps College. Based on their illuminations, script, and binding structure, I was able to conclude that these two manuscripts are Hindu religious texts created around the 19th or 20th century. To determine an approximate origin and the significance of these volumes, my research focused on the syncretism of religion, material history, and power dynamics in India. Their context was specifically framed within the history of manuscript construction and conservation.
24

La sculpture polychromée néo-gothique en Belgique vue par la Gilde de Saint-Thomas et de Saint-Luc, 1863-1914

Steyaert, Delphine 29 September 2014 (has links)
Ce travail doctoral se penche sur un groupe d’artistes et d’artisans actifs dans la seconde moitié du XIXe siècle dans le domaine de la sculpture, et plus précisément sur la façon dont ceux-ci ont à a fois restauré de nombreuses sculptures médiévales et réalisé des sculptures néo-gothiques. Le sujet a été circonscrit à la sculpture religieuse mobilière en bois, et plus spécifiquement aux statues et aux retables conservés dans des églises gothiques. Une approche multidisciplinaire, entre Moyen Âge et XIXe siècle, a été privilégiée. Les artistes et artisans étudiés (Jules Helbig, Adrien Hubert Bressers, les frères Blanchaert, Jean-Baptiste Bethune) posent les bases du style dit « des Écoles Saint-Luc » ou illustrent des travaux de la seconde génération (Léon Bressers). Ils sont membres de la Gilde de Saint-Thomas et de Saint-Luc et revendiquent, sous l’influence de l’architecte anglais A.W.N. Pugin, un lien exclusif avec l’art médiéval dans leurs réalisations. Au sein de la Gilde, l'étude de l'art médiéval et les discussions sur le mobilier religieux à créer se doublent d'une recherche sur les règles liturgiques (au sujet des autels principalement), de manière à retrouver, autant que possible, les formes et usages anciens tout en restant conforme avec les prescriptions en vigueur. Les membres, et en particulier les personnalités étudiées, participent ainsi au renouveau chrétien de la seconde moitié du XIXe siècle.<p>Les sculpteurs-restaurateurs et les peintres-restaurateurs sélectionnés visent avant tout une présentation jugée digne des sculptures médiévales qui passent entre leurs mains. Ils sont, pour ce faire, imperméables à toute notion d’authenticité. Les aspects religieux primant et dans un contexte de forte pilarisation, ils adoptent sur cette question une position monolithique, alors même que la réflexion au sujet de la restauration de la sculpture polychromée se développe, notamment au sein de la Commission royale des Monuments. Dans les traitements de restauration, les Blanchaert, les Bressers et Jules Helbig font preuve d’un vrai souci archéologique mais rarement de réflexion critique sur l’opportunité ou pas de reconstituer des éléments lacunaires, sur le bien fondé de l’adjonction des attributs, ou sur les pratiques de décapage et de repolychromie. Ce travail doctoral démontre par ailleurs que les nouvelles polychromies néo-gothiques, en particulier celles confectionnées par les Bressers, sont souvent le reflet, voire des copies, des anciennes polychromies quand elles étaient bien conservées.<p>Les discussions menées au sein de la Gilde ont eu un impact non négligeable sur la question du démembrement des autels baroques et néo-classiques ainsi que sur la création du nouveau mobilier néo-gothique en Belgique. <p><p>L’étude d’une série de retables néo-gothiques apporte de nouvelles clefs de lecture sur la conception des programmes iconographiques globaux, la répartition des retables dans l'espace ecclésial, la typologie des œuvres, la conception des compositions et le style adopté pour les groupes sculptés. L'influence de Pugin a pu être montrée, notamment dans le caractère très hiérarchisé donné aux œuvres, et cela à tous les niveaux de la représentation.<p>Dans son ensemble, ce travail doctoral offre une contribution significative sur l’historicisme et l’histoire des mentalités. <p> / Doctorat en Histoire, art et archéologie / info:eu-repo/semantics/nonPublished
25

Preservação do Presepio Napolitano do Museu de Arte Sacra de São Paulo : percursos metodologicos para a elaboração de um inventario cientifico

Ambrosio, Eliana Ribeiro, 1975- 23 February 2006 (has links)
Orientador: Luciano Migliaccio / Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Filosofia e Ciencias Humanas / Made available in DSpace on 2018-08-06T02:40:34Z (GMT). No. of bitstreams: 1 Ambrosio_ElianaRibeiro_M.pdf: 6127239 bytes, checksum: 24840996f1203f5df0dce7ba2644a16b (MD5) Previous issue date: 2006 / Resumo: A pesquisa partiu da análise documental do exemplar pertencente Museu de Arte Sacra de São Paulo para promover o resgate das informações históricas que permitissem o traçado de diretrizes para sua conservação e preservação. Para tanto, o estudo tratou da revisão da documentação existente junto ao museu, que até o momento não havia sido sistematizada e organizada. Dado o volume de elementos a serem tratados em conjunto, e com a finalidade de facilitar posteriores acessos à coleção, o acervo ganhou um banco de dados. Este reúne as informações existentes nos diversos tombamentos e nas fichas catalográficas, fornecendo subsídios sobre trocas de acessórios e problemas de conservação, por quê a coleção passou ao longo dos anos, além de contar com registros fotográficos / Abstract: Based on the analyze of the documents about the Neapolitan crib that belongs to Museu de Arte Sacra de São Paulo, the research intended to put together its historical information to allow create policy for its conservation and preservation. To achieve it¿s proposed, during the study, all documents that exist in the museum was reviewed and organized. As lots of records must be treated together, and intending to improve access into the collection, it was designed one database to manage the collection. It puts together the information of the different inventory and cataloguing data, and offers elements of the change of the accessories, conservation problems and photographic records / Mestrado / Historia da Arte / Mestre em História
26

L'iconographie historique et ouvrière d'Ozias Leduc à Shawinigan-Sud

Lafontaine, Nancy 24 April 2018 (has links)
Ozias Leduc a exécuté quinze tableaux dans l'église Notre-Dame-de-la-Présentation à Shawinigan-Sud. Six illustrent la découverte de la ville et les travaux traditionnels des Shawiniganais, ce qui est peu commun dans un lieu de culte. L'illustration de la vie des travailleurs a-t-elle suscité chez les Sud-Shawiniganais un sentiment d'appartenance à leur église ? Ce mémoire vise donc à découvrir si les peintures représentant l'histoire et la profession que pratiquent encore de nombreux citoyens, ont trouvé écho dans la population ou si elles n'intéressent que les amateurs d'art. C'est donc l'évolution du sentiment d'appartenance de la population qui est étudiée à travers les grands événements de la vie des œuvres, de la conception du projet à aujourd'hui. / Québec Université Laval, Bibliothèque 2013

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