Method and composition adjusted to the isoelectric point of hair for conditioning of oxidatively dyed hair

A method for conditioning and oxidative dyeing of human hair, said method comprising the steps of:

• a) providing a hair conditioning composition having a pH value of from 3.4 to 3.9, said pH value corresponding to an isoelectric point of the human hair, said hair conditioning composition comprising an aqueous solution of from 0.001 to 2.5% by weight of a polymer having cationic groups;
• b) applying an oxidative hair dyeing composition to the human hair in order to dye the human hair;
• and
• c) simultaneously or subsequently to the applying of the oxidative hair dyeing composition of step a), applying said hair conditioning composition to the hair.

A hair treatment composition having a pH value from 3.4 to 3.9, said pH value corresponding to an isoelectric point of human hair, and said hair treatment composition consisting essentially of an aqueous Solution of water, from 0.001 to 2.5 percent by weight of a polymer having cationic groups and at least one additive selected from the group consisting of buffers, fatty alcohols and cationic surfactants;

• and
• wherein said hair treatment composition contains from 0.5 to 10 percent by weight of at least one of said fatty alcohols, when said at least one of said fatty alcohols is present in said hair treatment composition;
• and
• wherein said hair treatment composition contains from 0.1 to 10 percent by weight of at least one of said cationic surfactants, when said at least one of said cationic surfactants is present in said hair treatment composition.

An article of manufacture comprising a pressure-resistant aerosol container;

• a hair treatment composition contained in the aerosol container and a device for generating a foam from said hair treatment composition contained in the aerosol container;
• wherein said hair treatment composition has a pH value from 3.4 to 3.9 and consists essentially of an aqueous solution of water, from 0.001 to 2.5 percent by weight of a polymer having cationic groups and at least one additive selected from the group consisting of buffers, fatty alcohols and cationic surfactants;
• and
• wherein said hair treatment composition contains from 0.5 to 10 percent by weight of at least one of said fatty alcohols, when said at least one of said fatty alcohols is present in said hair treatment composition;
• and
• wherein said hair treatment composition contains from 0.1 to 10 percent by weight of at least one of said cationic surfactants, when said at least one of said cationic surfactants is present in said hair treatment composition.