Brassiness isn’t just a color issue, it’s driven by oxidation and metal build-up. When hair is lightened, it becomes porous, and more vulnerable to external aggressors. Shower water is often high in metals like copper and iron, which embed in the hair and catalyse peroxide breakdown, amplifying warm undertones (AKA brassiness).
Hard water minerals like calcium and magnesium contribute by coating the hair, making it dull and resistant to colour. Removing these metals and minerals and preventing them from reattaching ensures brighter, longer-lasting blonde for all highlighted and lifted tones.
Was this article helpful?
That’s Great!
Thank you for your feedback
Sorry! We couldn't be helpful
Thank you for your feedback
Feedback sent
We appreciate your effort and will try to fix the article