The present invention relates to a kit, preferably for coloring keratin fibers, the kit comprising in spatially separated form at least two kit components: A) a first kit component comprising at least these constituents: at least one alkaline agent； at least one amino acid； at least one organic phosphate ester compound selected from the group consisting of a monoester of a phosphate of one or more alkoxylated fatty alcohols, a diester of a phosphate of one or more non- alkoxylated fatty alcohols, and a mixture of both； water； and optionally at least an oxidative dye； water； and B) a second kit component comprising at least these constituents: at least one emulsifier； hydrogen peroxide； at least one fatty alcohol； and water. The invention relates also to a process of manufacturing a composition which is the second kit component, a composition obtainable by such process, a ready-to-use composition, a way of preparing such and to a use of an emulsifier as in formula (I) and defined above in combination with the organic phosphate ester compound defined above to reduce the viscosity of haircoloring creams.
