雑布の基礎的研究(第一報) : 材質と汚れについて

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Homemaking education textbooks at the elementary level include a unit of study on honsecleaning and equipments. The use of the typical housecleaning-cloth is within the scope of the topic. Hence, the authors carried out an experiment on housecleaning-cloths preceded by an nvestigation (total period Jan. 1965-Dec. 1966), in order to strengthen subject matter and also ito help in evaluating textbooks contents. Fifth grade pupils of both sexes (N=80) were asked for their preference of functional houseclean ing-cloths; university students (female N=80) were asked to specify from their standpoint, preference for size, thickness, fabric material, and conditions in using. As a result, five of the most used fabrics were selected (controlled for size, layers and stitches) for experiment on : variation in weight, progress in degree of dirt contamination, dirt permeation and release, and germ absorption. The results are as follows : 1. Size seems to be dominant when the user's hands are regarded as a standard; for thickness, a towel folded in three or four is preferred. Also, towel is preferred by both children and adults over other fabrics. 2. In comparing towel with bleached cotton, the thicker they are, the less they detach dirt, and vice versa, so that it may be said that the folding of cloth is better than stitching many layers. Knitted goods become dirty regardless of ways of folding and the stain will not come out even by washing. 3. When the progress of the degree of contamination was observed by a photoelectric reflection meter, the measurement of knitted goods became ineffective after a month's use. 4. Observing the state of the permeation of methylene blue, it permeates equally through a towel, knitted goods, bleached cotton and cotton flannel, which are folded in threes or fours. A towel absorbs it well even when it is folded in two. Tetron-broad absorption is especially bad. 5. When the state of absorption and release of artificially tainted liquid was observed, a towel not only absorbs it well but releases it as well. Tetron-broad absorbs it a little, so its release is very well. Bleached cotton absorbs it better than tetron-broad, but its release is the worst of the three. The authors think this is why the stain which dyes fibres lowers surface reflexibility. 6. As for the number of germs adhered to each material while in use, a towel whch absorbs dirt well stands first, then cotton flannel and knitted goods, but the germs less adhere to bleached cotton and tetron-broad.
日本家庭科教育学会の論文
1968-06-01

雑布の基礎的研究(第一報) : 材質と汚れについて

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