Testing and Assessment of Detergents.

In the reported experiments, selected examples taken from numerous detergent tests were used to demonstrate the factors which have a significant influence on the result. In assessing test results it is particularly important to take into consideration the structure of the chosen laundering program, the amount of detergent used in relation to the hardness of the water, and the number of laundering cycles carried out. The authors investigated the change in degree of whiteness on unsoiled test fabrics such as Turkish towelling, after numerous launderings, as a means of assessing detergents. In the standard laundering technique and the method using anonymous soiled laundry and artificial soiling, differences in white test materials between various detergents are largely reproduced correctly. The use of heavily greyed fabrics by the sector method likewise shows up product differences in detergent tests.