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More from Color Notes: Beyond Color Notes

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Science

Hard Water and LA Sun Are Fading Your Hair Color: What to Do

LA tap water tests between 200 and 250 PPM hardness, and the UV index peaks at 11 for five months of the year. Both forces are attacking your color continuously, and most advice written for other climates does not account for them compounding. This covers the exact mechanism and what a product routine calibrated to LA conditions actually requires.

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Technique

Why Highlights Turn Brassy: Chemistry and Real Fixes

Brassiness after highlights is not random and it is not your fault. It follows a predictable chemical sequence that a skilled colorist should have accounted for in the formulation. This covers why it happens, what the timeline usually looks like, and what a better-executed version of the same service would have prevented.

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