Agent, useful for coloring and/or brightening keratin fibers, preferably human hair, comprises specific amount of one or more formic acid ester and imido formic acid ester

摘要

Agent (Q) for coloring and/or brightening keratin fibers, preferably human hair, comprises 0.001-15 wt.% of one or more formic acid ester (I) and imido formic acid ester (II). An independent claim is included for a method for brightening keratin fibers comprising applying a pretreating agent (M1) on the fiber, applying an agent (M2), before using another agent (M3), washing the agent (M2) after 5-30 minutes, optionally applying an agent (M4) on the fiber, and washing the agent after an influential time, where at least one of the agent (M1), (M2), (M3) is (Q).