23—The Determination of Fatty Matter in Scoured Wool and Tops

The existence of a barrier to non-polar solvents has been shown to operate during solvent extraction of scoured wool and tops and a mechanism for the formation of such a complex layer is proposed by analogy with the phase separations observed with soap-amphiphile-water systems. Direct evidence for the existence of a complex protective layer has been obtained by extraction experiments on grease layers.