This is in reference to ophthalmic (spectacle) lenses. Some polycarbonate lenses transmit upto 58%UV when checked at 390nm cut-off.
2006-08-28 04:51:23 · 5 answers · asked by r_wadhwa 3 in Health ➔ Other - Health
Real question is: When polycarbonate is known to cut-off 100% UV, why do some polycarbonates show UV transmission through them when tested?
2006-09-03 08:22:14 · update #1
I think what you have referenced for your information source regards the polycarbonate as the substrate, or basic material of the lens, which blocks some UV, but requires an additional coating to block 100% UV.
2006-09-04 17:18:49 · answer #1 · answered by Pup 5 · 0⤊ 0⤋
Sunsenors are mopre reliable at 100% UV protection...the best in world belong to Brown & Root compnay..buy one and see for yourself.
2006-09-03 03:13:25 · answer #2 · answered by Anonymous · 1⤊ 0⤋
I haven't the foggiest. Good luck in finding what you need.
2006-09-05 03:52:00 · answer #3 · answered by Pepsi 4 · 0⤊ 0⤋
no idea
2006-09-04 20:33:00 · answer #4 · answered by rajan naidu 7 · 0⤊ 0⤋
???????????????? What????????????????
2006-09-04 23:05:09 · answer #5 · answered by Lallithambigai U 2 · 0⤊ 0⤋