Blacklight dust-free lightening powder lightens up to 8 levels and tones in one single step. Its formula is infused with powerful dyes and pigments that neutralize any unwanted brassiness, resulting in a beautiful cool toned blonde. USE: Formulated for use with Blacklight Smart Developer. Off the scalp: Mixing ratio is 1:1. Depending on degree of lightening desired, choose one of the following Blacklight Developers: 10 vol. (3%), 20 vol. (6%) or 30 vol. (9%). Processing time varies depending on the degree of lightening desired and the condition of the hair.  On the scalp: Mixing ratio is 1:1.5. Use a 20 vol. (6%) developer or less. Do not process longer than 60 minutes. Apply on dry hair. Check every 10 minutes to avoid over-processing. Upon completion, rinse hair with lukewarm water until water runs clear. Lightly shampoo hair using Blacklight Shampoo and then apply Blacklight Conditioner. For additional conditioning, replace Blacklight Nourishing Conditioner by Blacklight Intensive Replenishing Mask. Finally, seal the cuticles by applying a small amount of Calura Color Lock to damp hair. If additional toning is necessary or desired after completing the lightening process, apply toner to shampooed hair and follow remaining directions.