6 days ago · Ultraviolet radiation lies between wavelengths of about 400 nanometres (1 nanometre [nm] is 10 −9 metre) on the visible-light side and about 10 nm on the X-ray side, though some authorities extend the short-wavelength limit to 4 nm. In physics, ultraviolet radiation is traditionally divided into four regions: near (400–300 nm), middle (300
Although ultraviolet (UV) radiation amounts to only 3% of the total radiation that reaches the earth, it is energetic enough to cause chemical reactions, weathering of polymers, fading of certain dyes and even eye damage. The UV spectrum is commonly divided into three ranges: 1. UV-C, 200 – 290 nm 2. UV-B, 290 – 315 nm 3. UV-A, 315 – 400 nm
A coating that filters UV light does not allow UV rays to enter the glass, while UV filters that absorb light effectively “trap” it before it gets to the artwork underneath. Artglass, for example, uses a UV-blocking molecular film that blocks over 90% of UV light, depending on the model. UV protection on glass use coatings like the above Acrylite® UV filtering (OP-3) is a continuously manufactured acrylic sheet which filters out 98 percent of damaging UV rays, protecting paper artwork, prints, and documents from fading, yellowing, and brittling. OP-3 acrylic sheet is light weight, has superior impact resistance and is an ideal choice for framing articles of value. . 445 41 346 46 184 300 287 264does acrylic block uv rays
