Method for lightening human keratin fibers using at least one anhydrous composition, at least one organic amine, and at least one oxidizing agent, and device for use thereof

A process for lightening human keratin fibers, comprising:

• (a) applying to the fibers:
• at least one anhydrous composition (A) comprising at least one fatty substance and at least one surfactant,
• wherein the at least one fatty substance is liquid at a temperature of 25° C. and at atmospheric pressure, and
• wherein the at least one fatty substance is present in an amount ranging from 10% to 99% by weight, relative to the weight of the anhydrous composition (A);
• at least one composition (B) comprising at least one organic amine having a pKb less than 12;
• and
• at least one composition (C) comprising at least one oxidizing agent;
• wherein:
• compositions (A), (B), and (C) are applied to the fibers successively and without intermediate rinsing, or
• compositions (B), (A), and (C) are applied to the fibers successively and without intermediate rinsing, or
• composition (C) and a mixture resulting from mixing compositions (A) and (B) are applied to the fibers successively and without intermediate rinsing;
• and
• (b) leaving the compositions on the fibers for a period of time sufficient to lighten the fibers.