抄録
An actual survey of soil redeposition in dry cleaning baths in use at dry cleaner's shops has been carried out, and some laboratory tests by the same cleansing agent as dry cleaner's shops' and by the agent re-dispersed with soils collected from a certain dry cleaner's working bath have also been performed.
Results are summarized as follows :
1) In the actual survey, it was observed that the soiling of cotton, wool and acrylic cloths by dry cleansing agent reached detectable degree. The soiling degrees obtained with three sample materials were not identical at different shops.
2) In laboratory tests of the same dry cleansing agent as that used at dry cleaner's, no correlation has been observed between the acid value or turbidity and soil redeposition of the liquid.
3) In the cleansing agent prepared by re-dispersing soils extracted from actually used liquid at a dry cleaner's, some definite relations were observed between soil concentration and acid value and also soil concentration and turbidity. A regular correlation was also observed in this liquid between soil concentration and the degree of soil redeposition on all of the three kinds of test cloths.
