Inorganic UV blockers — led by titanium dioxide — that reduce UV transmission through fabric and raise the measured UPF rating of outdoor, activewear, and workwear textiles.
UV protection agents are additives applied to or built into a fabric to reduce how much ultraviolet light passes through it, which raises the textile's measured UPF (Ultraviolet Protection Factor) rating. For outdoor, activewear, and workwear fabrics the workhorse is titanium dioxide, an inorganic mineral that scatters and absorbs UV across a broad band. Choose an inorganic blocker when wash-durable UPF is the priority, because it does not rely on a chromophore that bleaches out over time.
Titanium dioxide gives broad-spectrum attenuation and survives repeated laundering, but it carries an honest trade-off. Uncoated, photoactive grades can catalyze the very degradation you are trying to prevent, breaking down dyes and fibers under sunlight; surface-coated rutile grades are formulated to suppress that photocatalytic activity. Specify a coated grade for UV-attenuation finishing, and confirm it does not dull or shift your target shade before scaling up.
Organic UV absorbers from the benzotriazole class are also used in polymer systems, but one common member, UV-328, was added to the Stockholm Convention list of persistent organic pollutants in 2023 and is restricted in the European Union. RawSource does not position UV-328 as a recommended textile chemistry; it is noted here only as context. Confirm the regulatory status of any organic UV absorber for your application and jurisdiction.
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