Get perfect results with your hair dye. The activating emulsion Londa Professional Londacolor acts as an oxidizing agent, that is, as an oxidizing agent during dyeing. Its use in the right proportion with the permanent dye ensures una uniform coverage helping to significantly intensify the tone and shine of the final hair color. It therefore allows you to obtain una more visible color and, thanks to its influence on the consistency of the coloring mixture, also offers a more precise application.