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Color Notes: Science

Every Color Notes guide filed under Science.

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Science

Hair Gloss vs. Toner: What LA Salons Get Wrong

Gloss and toner are used interchangeably at most LA salons, but the products and the outcomes are not always the same. The difference matters when you are trying to understand why your color looks different visit to visit. Here is the chemistry behind each and the right questions to ask before agreeing to an add-on service.

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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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More from Color Notes: Beyond Science

A few more guides worth your time while you are here.

Products

Is Olaplex Worth the Upcharge? A Salon Treatment Guide

Olaplex is the most-asked-about salon add-on in LA, and also one of the most misapplied. The bond-building chemistry is real and clinically documented, but the service is often recommended regardless of whether your hair actually needs it. This covers what it does, when the science supports using it, and when it is just adding to your bill.

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Compare the LA Studios Behind Our Science Guides

Studios ranked on the criteria that actually matter. Direct links, no affiliate tracking.

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