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Color Notes: The Guide

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More from Color Notes: Beyond The Guide

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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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