This blue intensifier is created to be mixed with bleaching powders, bleaching creams, bleaching oils or oxidation colors (dyes) when you want to neutralize unwanted yellow-orange reflections and intensify cold ash-blue colors to obtain cool-neutral blondes. Directions for use: mix the following components: 1) Lightener or oxidation color. 2) Peroxide as indicated in the directions for use of the color or lightener you are using. 3) Blue Intensifier in different amounts according to the clients initial original hair color (see table below). Approximate processing time: 20 to 60 minutes checking hair frequently while processing. (Please read the package leaflet for the mixing ratios and application methods). ATTENTION: do not apply the maximum concentration on previously bleached or overly treated sensitized hair as to avoid undesired absorption of blue pigments on overly porous lengths and the tips.