Oligo Blacklight Smart Developer 10 Volume 32 Oz.

The Blacklight Smart Developer must be mixed with a Blacklight Lightener or Powershade.  It is specially formulated to provide perfect consistency of the final mix, deliver optimal lifting, and facilitate application. The Blacklight developers ensure consistent and reliable results with each application. DIRECTIONS: Use with all Blacklight Lighteners and Blacklight Powershades; follow instructions and mixing ratios on their packaging. Do not use metal tools.