On the 13 sorts of fabrics (multi-fiber test cloth) which were soiled by simultaneous wear for a four-day period by an adult male, the adhering states of natural soils (a part of collar of soiled white-shirt and soiled underwear) were observed with the scanning electron microscope.
The natural soils by neck wear are consisted of particulate soils and oily soils, and are distributed among the fibers in compliance with the sort of fabrics by mechanical rubbing and electro-static effect during wear. On the other hand, those of soiled underwear are mainly consisted of oily soils, and have a respective adhering state in compliance with the sort of fabrics.
The adhering states through the sort of fabrics and the sort of soilings were discussed on the affinity between fabrics and soils, the geometries of fibers and yarns, the electrostatic phenomena, and on the presence of moisture in fabrics.