ABSTRACT
Soiling is a natural process, since it increases overall randomness and consequently the entropy of the system. Naturally occurring soiling processes can be divided into three types: direct soiling, for example, a drop of grease falling on a tablecloth or particulate soil deposited on cloths by air currents, transfer of soil from a soiled surface to a cleaner one, for example, soiling of collars in contact with skin, soiling of armrests of chairs touched by hands. Electrostatic soiling, caused by attraction of airborne soil by electrostatically charged textile surfaces. Naturally occurring soils are: liquid soils, such as oil; particulate soils, for example, sand; composite soils consisting of liquid and solid components. The term "soil release" usually describes enhanced detergency of oily soils or fatty soils mixed with particulate matter of predominantly organic nature. The soil-release finishes shorten the induction period and lower the amount of soil left on fibers during the final period of the detergency process.
