Summary
A comparative study has been made of two common methods of measuring detergency. It has been shown that the method involving the measurement of light reflectance of soiled and washed fabrics gives results which lead to essentially the same conclusions as does the method involving the determination of the light transmission of wash liquors for a typical non-ionic detergent and a typical anionic detergent. The two methods did not give comparable results when tallow soap was used.
A simple experimental method which indicates the applicability of the method involving the measurement of light transmission of wash liquors has been devised.
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Barker, G.E., Kern, C.R. A comparison of two methods for testing detergents. J Am Oil Chem Soc 27, 113–116 (1950). https://doi.org/10.1007/BF02634378
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DOI: https://doi.org/10.1007/BF02634378