Living · 6 pages · 12 min
How sunscreen clothing differs from a white shirt
A white shirt reflects visible light, while ultraviolet transmission is a separate fact.
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From the opening
Sunscreen clothing is fabric built or tested to block ultraviolet, the shorter wavelengths a thin weave may let through. A white shirt is white because it reflects visible light, which says little by itself about those shorter waves. The opening covers visible white is not an ultraviolet block, weave, fiber, color, and finish, and a rating measures transmission.
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Inside
- Visible white is not an ultraviolet block
- Weave, fiber, color, and finish
- A rating measures transmission
- Stretch and soak change the cloth
- Where the idea stops applying
- A distinction worth keeping
Sources
- Ultraviolet protection factor as a fabric transmission rating
- Visible reflectance as a poor guide to ultraviolet block