Process for dyeing or lightening keratin fibres in two parts, using an oil-rich alkaline direct emulsion based on a solid nonionic surfactant with an HLB ranging from 1.5 to 10

摘要

The present invention relates to a process for dyeing or lightening keratin fibers, comprising the step of extemporaneously mixing at the time of use two compositions (A) and (B) and of applying the said mixture to the said fibers; the said mixture comprising at least 25% by weight of fatty substances relative to the total weight of the composition obtained from the mixing of two compositions (A)+(B); with: —(A) representing a composition in direct emulsion form whose content of oil(s) ii) is at least 30% by weight relative to the weight of composition (A), and comprising: i) at least one nonionic surfactant that is solid at room temperature and at atmospheric pressure, with an HLB ranging from 1.5 to 10; ii) at least one basifying agent; Hi) optionally at least one additional surfactant other than the solid nonionic surfactants (i), iv) optionally at least one dye; and —(B) representing a composition comprising at least one chemical oxidizing agent. A subject of the present invention is also a multi-compartment device and a composition (A) in direct emulsion form and the ready-to-use composition resulting from the mixing of compositions (A) and (B). The process according to the invention makes it possible to dye keratin fibers in a powerful, intense and/or homogeneous manner while at the same time being easy to prepare and to apply, since the mixture in the form of an oil-rich emulsion does not run, but remains localized at the point of application. The process of the invention also makes it possible to lighten keratin fibers in a noteworthy manner.

主权项

1. A process for dyeing or lightening keratin fibers, comprising:
(i) extemporaneously mixing at the time of use
(a) a composition (A) in direct emulsion form comprising:
at least one nonionic surfactant having an HLB ranging from about 1.5 to about 10, which is solid at room temperature and at atmospheric pressure;at least one basifying agent;optionally at least one additional surfactant other than the at least one nonionic surfactant;optionally at least one dye; andat least about 30% by weight of at least one oil, and(b) a composition (B) comprising at least one chemical oxidizing agent; and (ii) applying the mixture to the keratin fibers; wherein the mixture comprises at least about 25% by weight of fatty substances relative to the total weight of the mixture (A)+(B).