Agent comprises: a first composition (A) comprising one or more alkalizing agent, and a second composition (B) comprising one or more oxidizing agent, where at least one of the two compositions (A), and (B) comprises one or more fatty body comprising liquid hydrocarbon, the total quantity of the liquid hydrocarbon in the mixture of the compositions (A), and (B) is less than 20 wt.%, and at least one of the two compositions (A) and (B) comprises one or more reductones. Independent claims are included for: (1) a process for coloring and/or bleaching the keratin material comprising applying the compositions (A) and (B) on the dry or wet keratin material, without intermediate rinsing step and (2) a multi compartment device or kit for coloring and/or bleaching, comprising a first compartment comprising the first composition (A) and a second compartment comprising the second composition (B).
