Patent ID: 7749487
Filing Date: 2010-07-06
Classification: A61K

Abstract:
1. A method for estimating the residual amount of a cleansing composition remaining on skin after washing, comprising the steps of: a. treating an area of skin by applying the cleansing composition thereto wherein the cleansing composition contains at least 1% by wt. of an anionic surfactant; b. removing said cleansing composition from the treated area of the skin until there is no longer any perception of residual cleansing composition remaining on the treated area of the skin; c. applying to the treated area of the skin a solid or semisolid film or coating, that is soluble or dispersible in a first reagent, the film or coating containing an effective amount of dye and/or pigment(s), wherein said dye and/or pigment(s) are capable of adsorbing, reacting and/or otherwise associating with either the anionic surfactant or human or animal skin and is/are present in a sufficient amount capable of detection in its associated state on the skin; d. contacting the film or coating with sufficient first reagent effective to allow the dye and/or pigment contained in the film or coating to contact the treated area of the skin; and e. assessing the amount of dye and/or pigment adsorbed onto either the skin or residual surfactant upon the skin upon removal of the film or coating.