27 Jan, 2019 → by ClaimboUser745489
Not enough peroxide in bottle.
I use 2 boxes of Preference 9 1/2 A lightest ash blonde. I was about to color my hair for my birthday & one box of peroxide was short. I wouldn't care so much if it wasn't for my birthday. I have been using this product for many years & this is the first time it ever happened.