LOreal DIACTIVATEUR Developer Diarichesse/Dialight 33.8oz (6 Vol 1.8%) The Loreal Diactivateur is an Oxidant cream activator specifically formulated to work with DIARICHESSE and DIALIGHT hair color. This offers vibrant true colors to gray hair coverage. The creamy consistency delivers optimal Permanent and Demi-Permanent color performance. This can be used with Majirel and Majirouge hair colors for softer more natural colors with less lift and more color deposit or when coloring to achieve darker colors.