Notice catalographique « Fill materials and methods for scratch repair on poly (methyl methacrylate) used in face-mounted photographs »
- Titre
- Fill materials and methods for scratch repair on poly (methyl methacrylate) used in face-mounted photographs
- Auteur ou éditeur
- O'Connor, Kaslyne R.
- Queen's University
- Lieu de publication
- Kingston, Ontario
- Maison d'édition
- Queen's University
- Date de publication
- 2015
- Collation
- ix, 51p; ill. (chiefly colour)
- Résumé
- A primary conservation issue for the sustained use of face-mounted photographs is the inherent susceptibility of the acrylic sheet surface to abrasions. Scratches disfigure the entire surface of the poly(methyl methacrylate) (PMMA) sheet by changing the surface topography and distracting the viewer from the photograph. Scratches on acrylic sheet surfaces can be the result of improper handling, storage, and routine cleaning, and can range from micrometers to centimeters in size. The care, storage, and conservation of these acrylic face-mounted photographs have become growing subjects of debate and preservation experiments among the conservation community. The primary goal of this study was to determine the quality of scratch repairs for acrylic sheeting and their suitability for the conservation and preservation of face-mounted photographs. Scratches were made on acrylic samples and repair was attempted through the use of scratch reduction techniques and fillers. The fill materials (Paraloid B-72, Dymax 4-20638, and Hxtal NYL-1) are products with refractive indices similar to PMMA, low viscosities, a resistance to yellowing, and favourable working times. Scratch reduction techniques, attempting to decrease the amount of light refraction by the scratch ridges, included flattening and scraping. Coupons were subjected to accelerated thermal and light ageing to detect any negative effects on the poly(methyl methacrylate) caused by the application of these scratch fillers. Repairs underwent analytical tests with a spectrophotometer and glossmeter for color and surface change, as well as visual comparisons of ensuing scratch reduction without negatively impacting the finishing surface. With accelerated ageing the Paraloid-B72 coupons displayed the potential for the largest negative change in b* (yellowing) values and decreased surface gloss while the Hxtal NYL-1, in both color and gloss, was able to surpass and replicate the closest values to an unmodified acrylic surface. A comparative observational study revealed that both the scratch-scraped Hxtal NYL-1 coupon and the scratch-unmodified Paraloid-B72 coupon were the most visually effective in reducing the prominence of surface scratches.
- Notes
- Research project submitted to the Department of Art in conformity with the requirements for the Degree of Master of Art Conservation
- Langue
- English = Anglais
- Sujet
- Photographs - Conservation and restoration
- Photographies - Conservation et restauration
- Pays
- Canada
- Type de document
- Monograph = Monographie
- Localisation
- TR 465 O36 2015
- Clé
- 17455
- Collection
- Catalogue