Plain-language guides to formats, ingredients, packaging and compliance — written by the people who run the lines.
One absorbs and one is the serum. Hydrogel patches and sheet masks differ in delivery, occlusion, wear time and cost per…
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The same line drawn three ways. Pencil blends and fades, gel holds a soft edge, liquid gives precision that survives wat…
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A shade approved under one light is a shade that fails in another. Matching needs a defined illuminant, a defined film a…
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SPF is a measured value under laboratory conditions, and the label has to explain how to use it. The number is not a dur…
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A stick trades water for structure. That makes it stable, portable and easy to reapply — and limits how much active it c…
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The INCI name is the only name that is legally usable on a label. Trade names, common names and botanical names are not …
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The vocabulary that comes up in every formulation meeting, in one page. Save it before your next supplier call.
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