ブックタイトルConservation and Restoration of Western Paper

概要

Conservation and Restoration of Western Paper

gall ink corrosion were repaired in 1987with Japanese tissue and carboxymethylcellulose, portions of the manuscript hadcontinued to deteriorate. For the time beingthe corroded pages of the manuscript havebeen mechanically stabilized with gelatincoatedthin tissue, reactivated with ethanol/water (75:25) solution to keep moistureto a minimum (Photos 20a-c). Someof the corrosion is also attributed to thepresence of copper containing pigments,and a research project on this subject wascommenced in an effort to find a way totreat and stabilize this type of corrosion.Preliminary testing indicates that treatmentwith tetrabutylammonium bromide (TBAB)has potential, but the results have yet to besubstantiated 12 .5. GELLAN GUMGellan gum, a high molecular weightpolysaccharide-based rigid gel, wasfirst introduced to the North Americanconservation community by Italianconservators Iannuccelli and Sotgiu(Central Institute for the Restoration andAQUEOUS TREATMENT RISKS? May result in colour change to ink and paper? Risk of ink bleeding? May alter surface of the ink? Purified water may remove calcium naturally found inpaper? May result in cracks and loss of substrate in degradedink areas due to variations in water penetrationproperties? Formation of white crystals? Magnesium based deacidification treatments (pH 10and higher after drying) may cause discolouration ofink and paperDiagram 6 Aqueous treatment risksPhoto 18b Gelatin is smoothed to evenly coat the MylarPhoto 18a 2% type B gelatin applied to Mylar with syringePhotos 18a-c Preparation of gelatin-coated thin tissuePhoto 18c Tissue is laid on top of gelatin layer69