Agent for the oxidative dyeing of hair, method for the preparation of the agent and use of the agent

A method of preparing a dyeing agent for human or animal hair, comprising the steps of:

• mixing approximately one-third by weight of an oxidation dye in creme or gel form containing an effective amount of an oxidation dye, and approximately two-thirds by weight of a developer solution containing approximately two percent of hydrogen peroxide, and 0.0001 to 1.00 percent by weight of a catalyst with the oxidation dye before the addition of the developer solution, said catalyst being at least one metal salt selected from the group consisting of copper (II) chloride, copper (II) sulfate, cobalt chloride, cerium sulfate and vanadium sulfate, so as to result in a dyeing agent having a pH between 5.9 and 6.9.

A method of preparing a dyeing agent for human or animal hair, comprising the steps of:

• mixing approximately one-third by weight of an oxidation dye in creme or gel form containing an effective amount of an oxidation dye, and approximately two-thirds by weight of a developer solution containing approximately two percent of hydrogen peroxide, and 0.0001 to 1.00 percent by weight of a catalyst simultaneously with the mixing of the oxidation dye with the developer solution, said catalyst being at least one metal salt selected from the group consisting of copper (II) chloride, copper (II) sulfate, cobalt chloride, cerium sulfate and vanadium sulfate, so as to result in a dyeing agent having a pH between 5.9 and 6.9.

A method of preparing a dyeing agent for human or animal hair, comprising the steps of:

• mixing approximately one-third by weight of an oxidation dye in creme or gel form containing an effective amount of an oxidation dye, and approximately two-thrids by weight of a developer solution containing approximately two percent of hydrogen peroxide, and 0.0001 to 1.00 percent by weight of a catalyst immediately after the mixing of the oxidation dye with the developer solution, said catalyst being at least one metal salt selected from the group consisting of copper (II) chloride, copper (II) sulfate, cobalt chloride, cerium sulfate and vanadium sulfate, so as to result in a dyeing agent having a pH between 5.9 and 6.9.

A method of dyeing human or animal hair, comprising the steps of:

• preparing a dyeing agent having a pH between 5.9 and 6.9, from a mixture of approximately one-third by weight of an oxidation dye in creme or gel form containing an effective amount of an oxidation dye, and approximately two-thirds by weight of a developer solution containing approximately two percent of hydrogen peroxide, and 0.0001 to 1.00 percent by weight of at least one metal salt selected from the group consisting of copper (II) chloride, copper (II) sulfate, cobalt chloride, cerium sulfate and vanadium sulfate as a catalyst;
• immediately thereafter applying said dyeing agent to the hair and letting the same act on the hair for a period of time sufficient to dye the hair;
• and washing the dyeing agent out of the hair.

A method of re-dyeing human or animal hair which in natural state is dark and has previously been dyed to a lighter state, comprising the steps of:

• applying a first, conventional alkalinely adjusted hair dyeing agent to recent growth of darker hair close to the scalp, preparing a second dyeing agent having a pH between 5.9 and 6.9, from a mixture of approximately one-third by weight of an oxidation dye in creme or gel from containing an effective amount of an oxidation dye, and approximately two-thirds by weight of a developer solution containing approximately two percent of hydrogen peroxide, and 0.0001 to 1.00 percent by weight of metal salt selected from the group consisting of copper (II) chloride, copper (II) sulfate, cobalt chloride, cerium sulfate and vanadium sulfate as a catalyst;
• immediately thereafter applying said second dyeing agent to the lighter state hair adjacent to the recent growth hair and letting the same act on the lighter state hair for a period of time sufficient to dye the hair;
• and washing both dyeing agents out of the hair.

A method of waving and dyeing human or animal hair, comprising the steps of:

• applying a conventional permanent-wave preparation of the hair, which has previously been washed and wound on curlers, for a given period of time, washing out the hair, fixing the hair, still wound on the curlers, with a conventional liquid oxidizing fixing agent;
• removing the curlers, and re-fixing the hair with a dyeing agent having a pH between 5.9 and 6.9, from a mixture of approximately one-third by weight of an oxidation dye in creme or gel form containing an effective amount of an oxidation dye, and approximately two-thirds by weight of a developer solution containing approximately two percent of hydrogen peroxide, and 0.0001 to 1.00 percent by weight of salt selected from the group consisting of copper (II) chloride, copper (II) sulfate, cobalt chloride, cerium sulfate and vanadium sulfate as a catalyst;
• letting the dyeing agent act on the hair for a period of time sufficient to dye the hair, and washing the dyeing agent out of the hair.