著者

柏木 希介 近藤 憲子

出版者

The Japan Society of Home Economics

雑誌

家政学雑誌 (ISSN:04499069)

巻号頁・発行日

vol.22, no.4, pp.258-262, 1971-07-20 (Released:2010-03-09)

参考文献数

10

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In spite of long time storage over 1300 years, some of very old dyed textiles still seem to maintain beautiful color. Among others, red colored silk fabrics known as Horyujigire, which are believed to be the product of China in the 7th century, and the red string attached to a famous armor of the 12th century, both maintaining their clear red color, were examined with regard to the dyestuff and color as well.To identify the dyestuff used on these textiles, it is considered to be necessary to extract the dyestuffs directly from the dyed fabrics, not from plant tissue. In view of this we prepared silk cloths dyed with Rubeaceae roots, sapan wood, safflower, Rhizophoraceae wood and Texaceae wood.By paperchromatographic analyses we have found that the above two old fabrics would contain madder or chay root dyes. This conclusion seems to be in agreement with the result of the investigation by means of organic chemistry.Color fastness tests against the sunlight and washing on those cloths also showed that madder was more resistant than the others.

著者

菊池 裕子 齊藤 昌子 柏木 希介

出版者

The Japan Society of Home Economics

雑誌

日本家政学会誌 (ISSN:09135227)

巻号頁・発行日

vol.38, no.1, pp.33-38, 1987-01-20 (Released:2010-03-10)

参考文献数

10

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Photo-deterioration of natural fibers (silk and cotton) at the early stage was surveyed with regard to the changes of physical properties and chemical structure of the fibers.Photo-deterioration at the initial stage brought about yellowing and lowering of elongation and strength for both fibers. The changes in elongation and strength of silk induced by UV light, xenon lamp, and sun light showed that the steep decrease occurred at the early stage, followed by the gradual decrease in both strength and elongation, the latter being more remarkable than the former. However, for cotton, the decrease in strength was more pronounced than that in elongation and both changes were smaller as compared with silk. Furthermore the changes in elongation and strength of cotton were simply proportional to exposure time.Regarding the changes in chemical structure, the formation of carbonyl groups by oxidation of cotton fibers was confirmed by copper number measurement. With silk the decrease of tyrosine and tryptophane was found and related to yellowing phenomena.