| Project/Area Number |
60303025
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| Research Category |
Grant-in-Aid for Co-operative Research (A)
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| Allocation Type | Single-year Grants |
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| Research Field |
林産学
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| Research Institution | Tokyo University of Agriculture and Technology |
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Principal Investigator |
OYE Raysabro Tokyo Univ. of Agr.& Techn.,Faculty of Agr.: Professor, 農学部, 教授 (10015076)
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| Co-Investigator(Kenkyū-buntansha) |
OKAYAMA Takayuki Tokyo Univ. of Agr. & Techn., Faculty of Agr.:Res.Assoc., 農学部, 助手 (70134799)
MIURA Sadatoshi Tokyo National Inst. of Cultural Properties: Senior Scientist, 主任研究官 (50099925)
MASUDA Katuhiko Tokyo National Inst. of Cultural Properties: Research Director, 研究室長 (40099924)
YASUE Akio , 国立国会図書館協力課
USUDA Makoto Univ, of Tokyo, Faculty of Agr.: Professor, 農学部, 教授 (40011887)
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| Project Period (FY) |
1985 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥4,300,000 (Direct Cost: ¥4,300,000)
Fiscal Year 1986: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1985: ¥3,300,000 (Direct Cost: ¥3,300,000)
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| Keywords | Degradation of paper / Acidic paper / Neutral paper / Alum-treatment / Book paper / Accelate ageing / Degradation rate / Diethyl-zinc |
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| Research Abstract |
Since the modern paper-making technology has been introduced in the middle of the nineteenth century, a lot of books containing so-called acid papers has been published until to-day. Acid paper is more easily deteriorated compared to neutral papers like washi, the traditional Japanese folk art paper. This research project involves the examination of the present state of books preserved in the libraries to undertake the countermeasures to de-acidify papers to elongate the life of books. For de-acidification, alkyl-magnesium-carbonates and diethyl-zinc have been investiated. A specially designed apparatus for de-acidification of books was set up by the grant. Detailed conditions for de-acidifying by diethyl-zinc have been investigated successfully and its effects were evaluated from degradation rates of papers by the accelation tests. Washi is sometimes damaged by alum, an acidic agent, applied to improve the drawing properties for painting from old days. The effects of alum on washi was also investigated from a scientific view point. In order to prevent degradation of papers, the fundamental interpretation of the mechanism in degradation of paper, as well as cellulosic fibres for paper-making is indispensable. A new concept on degradation of papers has been established through the study in the project.
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