Abstract
The washing of cotton-mattress has been developed and is gradually prevailing, but the detergent effect is unknown. Contamination and detergency of eight used and two unused cotton-mattress have been analyzed on insoluble substance, water-soluble substance and oily-soluble substance. The results are as follows:
1) An insoluble subustance is removed more effectively by beating than by washing, but the cleaning effect is not just as same as that of new cotton mattress.
2) A water-soluble substance is removed more effectively by washing than by beating.
3) Some oily-soluble subustances are removed to some degree both by washing and by beating method, but oil content of cotton fiber is little removed by washing.
4) The degree of mattress soil depends upon living environment, how to use and metabolism of human body. Washing is effective for removal of any type of soil, but only one cycle of washing cannot remove all soil.
