Agents and methods are provided for coloring and/or lightening keratinic fibers. In one embodiment, an agent for coloring and/or lightening keratinic fibers includes, in a cosmetic carrier, (a) one or more oxidation dye precursors, (b) ammonia, (c) one or more ethoxylated fatty alcohols having a degree of ethoxylation from 80 to 120, and (d) one or more zwitterionic polymers. The agent contains no carbonates.