A QUANTITATIVE METHOD FOR MEASURING THE DETERGENT ACTION OF LAUNDRY SUPPLIES

An improved type of standard soil for measuring and comparing the detergent efficiencies of soaps has been developed. The technique of application of this soil to white, desized cotton sheeting has been studied with respect to obtaining a uniform product which is sensitive to small differences in washing procedure, both chemical and mechanical. The effects of time, temperature, soap concentration, and various rates of agitation have been investigated in connection with this soil. The results prove its sensitivity.A miniature wash wheel has been constructed for use in the above work. It exhibits several improvements over small machines of this type formerly used.