Method and composition for permanent waving and...

Details Method and composition for permanent waving and... Method and composition for permanent waving and...

A - Human Necessities

61

K

167/307

A61K 7/09 (1990.01)

Patent

CA 1315203

METHOD AND COMPOSITION FOR PERMANENT WAVING AND STRAIGHTENING OF HAIR Abstract of the Disclosure Hair is waved or straightened by maintaining it in tightly curled or in straightened configuration in contact with an aqueous waving lotion containing sulfite, bisulfite, or hydrosulfite together with a water-soluble mercaptan, at a molar ratio of 5:1 to 1:7.5, rebuilding with an aqueous lotion at pH 7 to 12 free from cross-linking, oxidizing, or reducing agents, and subsequently applying a neutralizer solution. Minimal damage to the hair results from use of the specified molar ratio. When waving hair, an optional additional step between cross-linking and neutralizing comprises maintaining the rebuilt hair in stress-free condition in contact with the ambient atmosphere to permit the curled hair to relax to the desired extent.

541619

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