Achieve a perfect result for your hair dye. The activating emulsion Londa Professional Londacolor acts as an oxidizing agent during the dyeing process. Its use in the right proportion with the permanent dye ensures una even coverage, helping to significantly enhance the tone and shine of the final hair color. It allows for a more noticeable una dye and, due to its influence on the consistency of the dye mixture, also offers a more precise application.