Patent ID: 8551464

Claim:
A method of styling mammalian hair, wherein said method comprises: either first contacting the hair for about 1 to 20 minutes with a styling-effective amount of a composition comprising a poly(vinylamine-vinylformamide) copolymer and an aqueuous carrier; and thereafter contacting the hair for about 1 to 20 minutes with a styling-effective amount of a composition comprising a bisulfite and an aqueous carrier; or contacting the hair for about 1 to 20 minutes with a styling effective amount of a composition comprising a bisulfite and an aqueous carrier; and thereafter contacting the hair for about 1 to 20 minutes with a styling effective amount of a composition comprising a poly(vinylamine-vinylformamide) copolymer and an aqueous carrier; and subsequently styling the hair by contacting the hair with a device comprising at least one flat surface at a temperature of at least about 100° C. for at least about 1 second to at least semi-permanently straighten the hair wherein the poly(vinylamine-vinylformamide) copolymer comprises a high molecular weight poly(vinylamine-vinylformamide) copolymer, a low molecular weight poly(vinylamine-vinylformamide) copolymer, or a combination thereof and wherein the bisulfite is selected from the group consisting of bisulfite salts of sodium, bisulfite salts of potassium and bisulfite salts of calcium.