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Author: Charles M. Selwitz Publisher: Getty Publications ISBN: 0892360984 Category : Art Languages : en Pages : 75
Book Description
This report attempts to isolate and separately examine each of the factors known to lead to cellulose nitrate decomposition, and then relate their contribution to the instability of the polymer when it is used as a bonding agent for ceramics and as a lacquer for metal objects. These factors include deterioration caused by heat, radiation, or acid impurities, or through the loss of plasticizer. There is, moreover, decomposition caused autocatalytically by the initial breakdown products. In particular, the publication examines new information on chemical changes under ambient conditions that has been developed recently through advances in analytical procedures such as chemiluminescence, X-ray scanning spectroscopy (ESCA), and more sophisticated viscometry. This new information will be added to the large body of data, collected over the past 150 years, on the instability of cellulose nitrate under more severe conditions.
Author: Charles M. Selwitz Publisher: Getty Publications ISBN: 0892360984 Category : Art Languages : en Pages : 75
Book Description
This report attempts to isolate and separately examine each of the factors known to lead to cellulose nitrate decomposition, and then relate their contribution to the instability of the polymer when it is used as a bonding agent for ceramics and as a lacquer for metal objects. These factors include deterioration caused by heat, radiation, or acid impurities, or through the loss of plasticizer. There is, moreover, decomposition caused autocatalytically by the initial breakdown products. In particular, the publication examines new information on chemical changes under ambient conditions that has been developed recently through advances in analytical procedures such as chemiluminescence, X-ray scanning spectroscopy (ESCA), and more sophisticated viscometry. This new information will be added to the large body of data, collected over the past 150 years, on the instability of cellulose nitrate under more severe conditions.
Author: Publisher: ISBN: Category : Nitrocellulose Languages : en Pages : 63
Book Description
Represents a detailed study of the complex history, deterioration and conservation problems of objects made of cellulose nitrate, followed by a brief description of other early plastics which the museum conservators may encounter.
Author: Publisher: ISBN: Category : Languages : en Pages : 4
Book Description
The conservation literature on cellulose nitrate deals mainly with the preservation of nitrate photographs and the deterioration of adhesives. This note addresses the neglected subject of the degradation, preservation, and storage of larger three-dimensional cellulose nitrate objects.
Author: Yvonne Shashoua Publisher: Routledge ISBN: 1136415157 Category : Antiques & Collectibles Languages : en Pages : 302
Book Description
Plastic objects are included more than ever in museums and galleries collections these days, but these items can start to deteriorate when they a just a few years old. In this book Yvonne Shashoua provides the essential knowledge needed to keep plastic pieces in the best possible condition so that they can continue to be enjoyed for many years. The historical development of plastics, as well as the technology, their physical and chemical properties, identification, degradation and conservation are all clearly and concisely covered within this single volume, making it an invaluable reference for the increasing number of conservators and curators that are encountering plastics in their day to day work.
Author: C V Horie Publisher: Elsevier ISBN: 1483182770 Category : Travel Languages : en Pages : 296
Book Description
Materials for Conservation: Organic Consolidants, Adhesives and Coatings provides an overview of one aspect of materials conservation treatment, particularly the properties of organic consolidants, adhesives, and coatings. The contents of the book are divided into two parts; these parts are background information and survey of polymers. The coverage of the first part includes polymer science and the uses and requirements of applied polymers. The second part covers resins, vinyl, thermoplastics, fillers, and colorants. The text will be most useful to individuals involved in the management and conservation of historic materials, such as museum curators. Materials engineer and polymer chemists will also benefit from the book.
Author: Michele R. Derrick Publisher: Getty Publications ISBN: 0892364696 Category : Art Languages : en Pages : 252
Book Description
This book provides practical information on the use of infrared (IR) spectroscopy for the analysis of materials found in cultural objects. Designed for scientists and students in the fields of archaeology, art conservation, microscopy, forensics, chemistry, and optics, the book discusses techniques for examining the microscopic amounts of complex, aged components in objects such as paintings, sculptures, and archaeological fragments. Chapters include the history of infrared spectroscopy, the basic parameters of infrared absorption theory, IR instrumentation, analysis methods, sample collection and preparation, and spectra interpretation. The authors cite several case studies, such as examinations of Chumash Indian paints and the Dead Sea Scrolls. The Institute’s Tools for Conservation series provides practical scientific procedures and methodologies for the practice of conservation. The series is specifically directed to conservation scientists, conservators, and technical experts in related fields.
Author: Robert L. Feller Publisher: Getty Publications ISBN: 0892360992 Category : Art Languages : en Pages : 173
Book Description
This report is the result of a three-year research program. It describes the chemical character of cellulose ethers as a general class of polymers and establishes an approximate ranking of the relative stability of each generic chemical subclass. Ranking the thermal stability of the polymers with respect to color change and loss in degree of polymerization led to the conclusion that as generic chemical classes, methylcellulose and carboxymethylcellulose appear to be the most stable of the cellulose ethers. Water-soluble ethylhydroxyethylcellulose apparently also possesses good stability. Of questionable long-term stability are hydroxyethylcellulose and hydroxy- propylcellulose. Ethylcellulose and organic-soluble ethylhydroxyethylcellulose proved to be of poor stability, potentially undergoing marked changes in twenty years or less under normal museum conditions. An important additional conclusion reached here, as well as in an earlier investigation, is that considerable variations in stability can occur within a generic chemical class from differences in the basic raw material, a natural product from plants, which is not a uniform, manufactured, chemical substance. Further variations can exist due to different manufacturing processes or commercial sources. Hence, commercial products must be evaluated individually to determine the most stable of a given generic type. Nonetheless, the authors believe the conclusions expressed here to be valid with regard to the relative stability of the generic chemical classes of cellulose ethers.
Author: Yvonne Shashoua Publisher: Routledge ISBN: 1136415165 Category : Antiques & Collectibles Languages : en Pages : 304
Book Description
Plastic objects are included more than ever in museums and galleries collections these days, but these items can start to deteriorate when they a just a few years old. In this book Yvonne Shashoua provides the essential knowledge needed to keep plastic pieces in the best possible condition so that they can continue to be enjoyed for many years. The historical development of plastics, as well as the technology, their physical and chemical properties, identification, degradation and conservation are all clearly and concisely covered within this single volume, making it an invaluable reference for the increasing number of conservators and curators that are encountering plastics in their day to day work.
Author: Charles M. Selwitz
Author: Charles M. Selwitz
Author: Linda S. Sirkis
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Author: Iraci, J. (Joe)
Author: 
Author: Yvonne Shashoua
Author: C V Horie
Author: Michele R. Derrick
Author: Robert L. Feller
Author: Yvonne Shashoua