COMPOSITION COSMÉTIQUE RICHE EN MATIÈRES GRASSES, COMPRENANT UN ÉTHER D'ALCOOL GRAS POLYOXYALKYLÉNÉ ET UN COLORANT DIRECT ET/OU UN COLORANT D'OXYDATION, AINSI QUE PROCÉDÉ DE COLORATION ET DISPOSITIF CORRESPONDANTS
A subject-matter of the present invention is a composition for dyeing keratin fibers, in particular human keratin fibers such as the hair, comprising: i) at least one non-ionic ether of polyoxyalkylenated fatty alcohols of formula (I), and also the optical isomers and geometrical isomers thereof； in which formula (I): R denotes a saturated or unsaturated and linear or branched C10-C30 hydrocarbon radical, R&prime； denotes a saturated or unsaturated and linear or branched C10-C30 hydrocarbon radical, which may be substituted by a hydroxyl radical, n is an integer between (1) and approximately (100) inclusive, and Alk represents a linear or branched, preferably linear, (C1-C6) alkylene group such as ethylene or propylene, preferably ethylene, ii) at least one fatty substance, iii) optionally at least one surfactant other than i), iv) at least one direct dye and/or at least one oxidation dye, v) optionally at least one basifying agent, vi) optionally at least one chemical oxidizing agent, and the fatty substance content of the composition representing in total at least 25% by weight relative to the total weight of the composition. The present invention also relates to a method using this composition and to a multi-compartment device that is suitable for the use of said method. R&mdash；(O-Alk)n-O&mdash；R&prime；&emsp；&emsp；(I)L'invention concerne une composition de coloration de fibres kératiniques, en particulier de fibres kératiniques humaines telles que les cheveux, comprenant : i) au moins un éther non ionique d'alcools gras polyoxyalkylénés de formule (I), ainsi que ses isomères optiques et géométriques, formule dans laquelle R représente un radical à base hydrocarbure C10-C30 linéaire ou ramifié, saturé ou insaturé, R' représente un radical à base hydrocarbure C10-C30 linéaire ou ramifié, saturé ou insaturé, qui peut être substitué par un radical hydroxyle, n est un entier compris entre 1 et 100 inclus et Alk représente un groupe alkylène C1-C6 linéaire ou ramifié,
