Patent ID: 7806939

Claim:
A method for personalizing the permanent modification of a color of a type of keratinous fibres of a person, the method comprising the steps of: a) selecting a color modification desired by the person; b) selecting a composition A according to the color modification selected in step a), wherein said composition A consists essentially of a reducing agent, optionally a coloring compound and optionally an alkalizing compound; c) determining a type of keratinous fibres to be colored; d) selecting a composition B that consists essentially of the alkalizing compound, wherein the level of basicity for composition B is selected based upon the type of keratinous fibres determined in step c) and the type of color modification selected in step a); e) selecting a composition C that consists essentially of an oxidizing compound, wherein the amount of oxidizing compound is selected according to the type of color modification selected in step a) and the type of keratinous fibres selected in step c); f) mixing compositions A, B and C at room temperature (RT); g) immediately after the mixing of compositions A, B and C, applying said mixture to keratinous fibres for a suitable period of time for obtaining the color modification selected in step a), wherein the temperature of the mixture applied to the fibres increases progressively from room temperature (RT) to a temperature ranging from about RT +3° C. to about RT +20° C. without the use of external heating; and h) removing said mixture from said keratinous fibres.