Blue bleaching powder is perfect for all lightening techniques, especially on medium to coarse structures, and provides up to 9 levels of lightening power. The blue violet pigment helps control unwanted warm highlights during the lightening process. Blue Diamond has a pleasant fruity scent and is enriched with K-Plex Complex conditioning complex that protects the integrity of hair structure and health. Dilution from 1:1.5 to 1:2.