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

概要

Conservation and Restoration of Western Paper

most suitable materials for conservationtreatment.3-2. Object ConditionThe majority of the papers used in thenotebooks were manufactured in the Taishoperiod, Japan. As seen in Diagram 1, thepapers could be classified into a few papercompanies (including some still in businessunder different company names), androughly into a few products. Fiber furnishanalysis 5 revealed softwood chemical pulpand softwood mechanical pulp as the mainraw materials for the paper 6 with a largepercentage having watermarks. 7The objects had surface dirt (Photo 4)and minor creases along the edges, and somewith large tears (Photo 5), losses toward theedges or water stains (Photo 6). They wereoverall in a good condition still retainingpaper strength and most of them withoutmajor damages such as volumes fallingapart, fissures, or trimmings. Loose andpasted inserts such as newspaper clips andscrap papers were discolored and showedadvanced acid damages which were alsoaffecting adjacent pages. The surfaces of thenotebook covers had an average pH of 4.0-4.5. Newspaper clips and scrap papers had apH of 4.0-4.5. 8 (Photos 7 and 8)Among the writing materials, the inkswere tested with iron (II) ion indicator paperfor color reaction (Photo 9), and X-rayfluorescence analysis were carried out byPhoto 7 Surface pH measurement using pH indicatorstrip1 (Merck)Photo 9 Color reaction testPhoto 8 Surface pH measurement using pH indicator strip2(Merck)Photo 10 X-ray fluorescence spectroscopy of the ink (TokyoNational Research Institute for Cultural Properties)35