抄録
We carried out a series of investigations concerning "stain-removing." After trying to remove various stains from several types of textiles, by methods that can be easily done in daily life, we investigated detergent-efficency and changes at different times. In this investigation, we used four types of textiles : cotton, silk, polyester, and a spun-blend of cotton and polyester, and 12 kinds of stains : soysauce, sauce, coffee, orange juice, curry, magic marker, ball-point ink, Chinese ink, lipstick, make-up foundation, iron rust and mud. The results obtained are as follows : 1. Water-soluble stains can be easily removed. 2. Oil stains can also be easily removed with the help of an organic solvent. 3. Chinese ink and magic marker stains, which contain dye, are impossible to remove completely.
