Surface active agents — Evaluation of certain effects of laundering — Methods of preparation and use of unsoiled cotton control cloth

A given number of test pieces of control cloth and machine loads of normally soiled articles are together subjected to a given number of consecutive laundering processes. After these processes characteristic properties of the test pieces of control cloth are measured and compared with their initial values. The changes in these properties during washing should enable the causes of damage in household textile articles in the laundering process to be detected.