Study on Japanese-paper:8. Deterioration of Japanese-paper
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概要
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I tried every microscopy accompanied by physical and chemical tests on the fibre of pure Kozo-paper for books manufactured during 1688-1868.<BR>Comparing these with the up-to-date goods, I can conclude as follows : <BR>(1) No external change is found by the lapse of years, but polymerisation of fibre is lessened, which enormously effects upon the strength of paper<BR>(2) Astringency is considerably weakened.<BR>(3) Bursting strength, tensile strength and extention are now remarkably feeb<BR>(4) Folding endurance still remains almost unchanged.
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