ABSTRACT
The kinetics of detergency may therefore depict the diffusion rate of water and detergent, simulate a mass transfer process, or present a complicated kinetic scheme of several simultaneously occurring processes. A kinetic study usually involves the determination of soil concentrations on the fabric or in the bath at various times. The mechanisms and kinetics of soiling with liquid soils differ from those of particulate solid soil. The effect of soiling conditions on particulate soil detergency also was quantitatively studied by Kissa, who used a dynamic technique for uniform application of soil under precisely controlled conditions. The amount of soil retained by the fabric depends on the washing conditions (agitation, detergent, and temperature), the nature of soil, the substrate, and the soiling conditions. Most water-in soluble liquid soils fall into this category and are therefore called oily soils. The detergency of oily soils can involve several mechanisms that operate separately, simultaneously, or consecutively.
