Changes in Some Properties of Aged and Historical Parchment

Abdel-Maksoud, Gomaa; Marcinkowska, Ewa

doi:10.1515/rest.2000.138

Cited by 17 publications

(13 citation statements)

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“…The L-scale measures lightness, and varies from 0(black) to 100 (perfect white). The a-scale measures red-green; (+a) means more red, (-a) measures green; the b-scale measures yellow-blue; (+b) meaning more yellow, (-b) deep blue [26]. The total color difference (∆E) is calculated according to the following equation:…”

Section: Color Changementioning

confidence: 99%

Influence of Bleaching Materials on Mechanical and Morphological Properties for Paper Conservation

et al. 2017

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64O LD historical papers always are suffering from yellowing and darkness specifically after natural aging, so this study aim to evaluated some traditional bleaching materials that used in treatments of documents and books like hydrogen peroxide and sodium borohydride. Physical and chemical changes in paper sheets (cotton linter paper and book) before and after aging were studied such as color change, pH measurements, tensile strength, burst strength, FT-IR spectrum and scanning electron microscopy (SEM). The result pointed out that H 2 O 2 & NaBH 4 lead to no significant improvement in mechanical properties of the historical paper. The effect of H 2 O 2 and NaBH 4 concentration, bleaching time and pH on paper sheet bleaching process were examined. Whiteness and yellowness results of the historical paper were evaluated for both bleaching methods. From this work it is clear that, it is not desirable to utilize bleaching agents for the treatment and conservation of ancient archaeological papers, but only in the essential cases they may be used in slight concentrations to treat yellowing, staining or stains.

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Section: Color Changementioning

confidence: 99%

Influence of Bleaching Materials on Mechanical and Morphological Properties for Paper Conservation

et al. 2017

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“…[15][16][17][18], studies of the water sorption properties of parchment or vellum are quite limited in the literature. Hansen et al [14] studied the effect of different relative humidity (RH) levels on the mechanical properties of modern vellum, while Abdel-Maksoud and Marcinkowska [19] investigated the sorption properties of new and historic parchment at 95% RH and 20 • C. They observed different behaviour between new, artificially aged and historic parchment, with the historical and artificially aged parchment showing reduced levels of sorbed water. The rate of change in moisture content (MC) of new and historic parchment was examined by Dernovšková et al [12].…”

Section: Introductionmentioning

confidence: 99%

Variation in the sorption properties of historic parchment evaluated by dynamic water vapour sorption

Popescu

Hill

Kennedy

2016

Journal of Cultural Heritage

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“…Antibodies against collagen, keratin and the polypeptide models [Pro-Ser(OBzl)-Gly] n , [Pro-Cys(Acm)-Gly] n and Ac-YRSGGGFGYRSGGGFGYRS-βAla-NH 2 Sera were collected before the initial immunization, as well as 7 days after each boost, and were tested for the presence of antibodies against immunizing antigens by ELISA. Specific antibodies recognizing the priming immunogens were produced in all experiments and remained at high levels after the fifth immunization.…”

Section: Serological Studymentioning

confidence: 99%

Collagen and keratin polypeptide models for assessing the natural and artificial protein decay of organic materials

Fotou

Sakarellos‐Daitsiotis

Ioakeimoglou

et al. 2016

J. Pept. Sci.

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Among the materials constituting the natural and cultural heritage, organic materials of proteinaceous origin as bone (collagen), parchment and woolen textiles (keratin) are the most susceptible to damage and decay because of their exposure to air pollution, inappropriate values of ambient temperature, humidity and light. Aiming at contributing to the development of a reliable and reproducible immunoassay for the evaluation of collagen and keratin decay, three polypeptide models of these proteins were designed, synthesized and studied. Polypeptide [Pro-Ser(OBzl)-Gly] incorporates the typical motif Pro-X-Gly of collagen; polypeptide [Pro-Cys(Acm)-Gly] is a model of the C-terminal domain of type I keratin, corresponding to the repeating unit Pro-Cys-X of keratin, while polypeptide Ac-YRSGGGFGYRSGGGFGYRS-βAla-NH encloses the characteristic repeating sequence GGGFGYRS of the N-terminal part of Type II keratin. These polypeptides may be considered as simplified models that mimic fragments of collagen and keratin resulting from artificial and natural ageing or decay. It is concluded that high recognition of anti-polypeptide antibodies, produced after immunizations, by the bone, parchment and textile samples is indicative of high deterioration, while high anti-collagen or anti-keratin recognition is indicative of low deterioration. Copyright © 2016 European Peptide Society and John Wiley & Sons, Ltd.

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Changes in Some Properties of Aged and Historical Parchment

Cited by 17 publications

References 1 publication

Influence of Bleaching Materials on Mechanical and Morphological Properties for Paper Conservation

Influence of Bleaching Materials on Mechanical and Morphological Properties for Paper Conservation

Variation in the sorption properties of historic parchment evaluated by dynamic water vapour sorption

Collagen and keratin polypeptide models for assessing the natural and artificial protein decay of organic materials

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