The adhering state and the amount of stains in the course of drycleaning using various kinds of solvents, detergents and enzymes have been studied by preparing twelve kinds of fabrics which were naturally stained with a sort of soils containing much of epidermal stratum corneum debris.
The amount of soils, epidermal stratum corneum debris adhered to hydrophilic fabrics, was larger than that adhered to hydrophobic ones. The ratio of sebaceous stain to epidermal stratum corneum debris on hydrophilic fabrics was larger than that on hydrophilic ones. The observation with a scanning electron microscope, has shown that the state of epidermal stratum corneum debris on hydrophilic fabrics seemed rough, and that of sebaceous stains on hydrophobic ones seemed more smooth than others.
In a simple drycleaning system, the soil removal efficiency was remarkably low for all fabrics with respect to the stains of epidermal stratum corneum debris. In the charge system, the efficiency was improved and certainly increased when enzymes were added, which were dissolved in a little water in reverse phase of charge system. Especially the combination of alkaline protease and hyaluronidase or chitinase, was remarkably effective.
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