IGORA cream peroxide developer is designed especially for IGORA Vibrance. It has the perfect consistency and peroxide strength to deliver the best color results when using Schwarzkopf's tone-on-tone color system. As an added bonus, it leaves hair in great condition and is easier to comb.color refreshing mid-lengths and ends.tonal refreshing after chemical texturizing services.toning pre-lightened or highlighted hair.great for coloring fine textured hair.true tone-on-tone color resultsIGORA Vibrance Developer Lotion comes in 2 strengths:1.9% (6 vol) is ideal for coloring darker, toning pre-lightened hair or for a standard tone-on-tone color service.4% (13 vol) is the one to choose for blending out white hair or when you need maximum color intensity (careful though, as it may slightly lift the natural hair color).The mixing ratio is one part IGORA Vibrance color cream to 2 parts Developer Lotion.How to Use:10-20 minutes without heat.5-15 minutes with heat.