Polycarbonate does not do a very very good job at blocking UV light. If it did there would be no need for UV coating on polycarbonate. Cameras with polycarbonate lenses have to have special UV coatings. Some advanced polycatbonate use a dual extrusion process to bind both regular polycarbonate with a more expensive UV treated polycarbonate.

Get free shipping on qualified UV Blocking Roller Shades products or Buy Online Pick Up in Store today in the Window Treatments Department.

Clear adhesive backed UV BLOCKING FILMS OR FOILS are available in 2' x 4' cut sheets or by the linear ft in 4' and 5 widths cut to any length required . The Clear Films block 99% of all UV below 400nm, while allowing more than 80% visible light transmission above 400nm. The Adhesive backed Clear Rolls (4' & 5') in full rolls are 100' long. UVLI ® Technical Data. United States Pharmacopeia states that no more than 10% of UV light transmission from 290nm to 450nm is acceptable. Brown and black bags block 98% or more of transmission in that range while UV Amber and UV Green exceed the minimum by allowing the transmission of less than 8% while remaining semi-transparent for ease of use.
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    2. Х θλθቤаχ
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Navigating the sunglasses market can be tricky with all the available options . The most important thing to look for is UV light protection. Choose a pair of sunglasses marked as “100% UV light blocking” or “UV absorption up to 400 nm.” If you spend a lot of time outdoors for work or fun, you can look for polarized sunglasses. But when sunlight passes through a polycarbonate greenhouse, the light is diffused. That means it shines from all directions simultaneously, wrapping around the plants with softness and without shadows — and polycarbonate naturally blocks harmful UV light. This has been sunlight 101. But this question says Why aren't 100% UV blocked sunglasses safe to view an eclipse with? When you wear a 100% UV blocked sunglass, the damage to the eyes comes from the IR region. Thats why special eclipse glasses are used which claims to block 100% UV, 100% IR, 99.99% intensive visible rays. – Kawin M. TZiwz.
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    • does plastic block uv light