KIS No Yellow Pro Booster is a highly concentrated violet pigment booster made to counteract yellow tones in blonde, bleached, grey or white hair. Great for boosting your no-yellow result or fine-tuning the tone.

How to use

• Use very small amounts (drop by drop).

• Mix into shampoo, mask, or conditioner and blend well.

• Apply, leave on briefly while watching the tone.

• Rinse thoroughly.
  Tips: wear gloves and strand-test first (porous hair grabs pigment faster).