Hair styling method

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 aqueous carrier;
• and
• thereafter contacting the hair for about 1 to 20 minutes with a styling-effective amount of a composition comprising a citrate and an aqueous carrier;
• or contacting the hair for about 1 to 20 minutes with a styling-effective amount of a composition comprising a citrate and an aqueous carrier;
• and
• thereafter contacting the hair for about 1 to 20 minutes with a styling-effective amount of 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 citrate is selected from the group consisting of citrate salts of sodium, citrate salts of potassium and citrate salts of calcium.