Helene Curtis Industries, Inc.

Julius F Kaplan

Chester A Davis

Norman L Edelberg

This invention relates to an improvement in the method of treating hair in which water wet hair is wrapped around rollers, a mercaptan-containing solution is applied to the hair on the rollers, and the mercaptan-wetted hair is thereafter neutralized with an oxidizing agent. This improvement comprises wetting the hair prior to wrapping it with an aqueous solution of a prewrap agent selected from the group consisting of alkali metal and ammonium sulfites and alkali metal and ammonium bisulfites. These prewrap agents are present at about 0.1 to about 1.0 Molar, at a pH of about 6.5 to about 7.5 and cleave no more than about 5 percent of the hair disulfide bonds before the mercaptan-containing solution is applied.

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Highland Park, IL, United States of America

Julius F Kaplan