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Post by OldSchool on Oct 9, 2015 3:12:27 GMT
I have been searching the web for a 5 snap flat face shield with some UV protection with no luck. I have read that any shield made from Polycarbonate will block almost 100% of UV "a" and UV "b" but will do nothing for UV "c". From what I have been able to find I would settle for blocking just the UV a & b. I have also come to realize not ever thing on the internet is true. I have been able to locate a 5 snap flat shield made from Polycarbonate and contacted the manufacturer and was told the shields were made so long ago they no longer have any information about them (go figure) I had one curved shield (the flat shield will become curved after a few weeks once snapped to the helmet) covered in window tint but the tint would not stay on, so then I had a flat shield covered in window tint but the tint could not make the tight bend. So does anyone know if Polycarbonate will block any UV rays? www.ebay.com/itm/smoked-motorcycle-face-shield-polycarbonate-/191696537279?hash=item2ca20106bf&vxp=mtrwww.ebay.com/itm/clear-motorcycle-face-shield-polycarbonate-vintage-/191696718460?hash=item2ca203ca7c&vxp=mtr
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Post by Guba on Oct 9, 2015 12:47:15 GMT
I work in the plastics industry, one of the products that we make is a few different sizes of polycarbonate storage bins. I have not heard it advertised as being UV resistant. I can ask one of the engineers when I go back to work on Monday.
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Post by OldSchool on Oct 9, 2015 20:27:07 GMT
Thank You Guba!
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Post by Guba on Oct 14, 2015 1:12:00 GMT
Well I'm still waiting for a reply from him. I see him next Friday, so I hope to have a solid answer by then. He was unsure how UV resistant polycarb is without modifiers.
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Post by OldSchool on Oct 14, 2015 4:38:08 GMT
That is fine and while we are on the subject, what is something good (I mean great) to clean the Polycarbonate with? I have always used Loctite Plastic Cleaner #30559 for it cleans the windshield and face shield very well and will not scratch but I am thinking Loctite does not make the cleaner anymore.
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Post by Guba on Oct 14, 2015 23:20:30 GMT
That is fine and while we are on the subject, what is something good (I mean great) to clean the Polycarbonate with? I have no idea, I just use whatever we have at work to clean my polycarb glasses. I assume it's safe for polycarb...
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Post by OldSchool on Oct 15, 2015 15:56:24 GMT
Well I did find this -- Ultraviolet Treatment
Another beneficial lens treatment is an invisible dye that blocks ultraviolet (UV) light. Just as sunscreen keeps the sun's UV rays from harming your skin, UV-protective treatments for eyeglass lenses block those same rays from damaging your eyes.
Overexposure to ultraviolet light is thought to be a cause of cataracts, retinal damage and other eye problems.
Regular plastic eyeglass lenses block most UV light, but adding a UV-blocking dye boosts UV protection to 100 percent for added safety. Other eyeglass lens materials, including polycarbonate and most high-index plastics, have 100 percent UV protection built-in, so an extra lens treatment is not required for these lenses.
Photochromic lenses also block 100 percent of the sun's UV rays without the need for an added UV lens treatment.
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Dr. Gary HeitingAbout the Author: Gary Heiting, OD, is senior editor of AllAboutVision.com. Dr. Heiting has more than 25 years of experience as an eye care provider, health educator and consultant to the eyewear industry. His special interests include contact lenses, nutrition and preventive vision care. Connect with Dr. Heiting via Google+.
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Post by Guba on Oct 15, 2015 22:25:01 GMT
Sounds like natural (if you can call it that) polycarbonate automatically fits the bill. Good to know.
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Post by OldSchool on Oct 16, 2015 1:32:10 GMT
Looks like it. I have found 3 different face shields that boast 100% UVa and UVb protective and all three are made form Polycarbonate and it does not seem to matter if they are smoked or clear in color.
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