The Blonde Journal
The Blonde Journal is Blacklight Blonde Science's guide to understanding blonde hair — the chemistry behind brassiness, the science of toning, and the routines that keep lightened, highlighted, and colour-treated hair bright between salon visits. Written by our formulation team in collaboration with professional hair colorists.
Not sure how often to use purple shampoo? Use it too little and brassiness never fully corrects. Use it too much and hair turns lavender. This guide gives you the exact frequency, leave-on time, an...
Toning your hair at home doesn't require a salon visit or box dye. Learn exactly which toning product to use for your brassiness type, how long to leave it on, and how to make your results last — s...
Brassy hair isn't a colour mistake — it's chemistry, and it's fixable. Learn exactly how to identify your brassiness type, which toning shampoo to use, how fast to expect results, and how to keep i...
Brassy hair isn't random — it's chemistry. When hair is lightened, the blue pigment molecules, the smallest and most fragile, fade out first. Once they're gone, the warm yellow and orange pigments ...
Not sure if you need a violet shampoo or a blue shampoo? Learn the key differences, when to use each, and how to keep blonde hair bright, cool, and brass-free.
Discover why blonde hair turns brassy and how to keep it bright using violet shampoo, hydration, and protective treatments.
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