Method of preparing particularly skin-compatible cosmetic or dematological cleansing preparations

A method of reducing the binding of surfactants to the surface of the skin, which comprises determining, using customary methods, the critical micelle concentration (CMC1) of one or more washing-active surfactants which have a tendency to bind to the surface of the skin (surfactant A), subsequently choosing one or more cosurfactants (surfactant B), and, by varying the relative concentrations of surfactants and cosurfactants to one another, determining the respective concentrations and the concentration ratio to one another at which the critical micelle concentration (CMC2) assumes a desired value which is lower than CMC1, and subsequently combining the customary constituents of a washing-active cosmetic or dermatological preparation together with surfactant A and surfactant B in the concentrations determined in each case.

The use of one or more cosurfactants (surfactant B) in a mixture with one or more surfactants which differ from surfactant B (surfactant A), for reducing the binding of surfactant A to the surface of the skin.

The use of one or more cosurfactants (surfactant B) for the preparation of mild washing-active cosmetic or dermatological preparations with a further content of one or more washing-active surfactants which have a tendency to bind to the surface of the skin (surfactant A), which, when used, achieve a decrease in or prevention of the binding of surfactant A to the surface of the skin.

The method or use as claimed in any of the preceding claims, wherein sodium lauryl ether sulfate is chosen as surfactant A.

The method or use as claimed in any of the preceding claims, wherein one or more anionic surfactants from the group of N-acylamino acids and salts thereof is chosen as surfactant B.