Although UV filtering plexiglass can not completely prevent colors from fading or darkening, it does filter out up to 98% of harmful UV light. This makes it the ideal plastic sheet material for protecting artwork, paper, or other keepsakes, that can turn yellow, fade, and become brittle. Skitement Ultra-Transparent UV Resistant Frame Grade Acrylic Plexiglass Clear Sheet Picture Frame Replacement 11x14 Inches 0.0625" (1/16") Pack of 2 Pcs. 97. $2999 ($15.00/Count) FREE delivery Tue, Jan 16 on $35 of items shipped by Amazon. Only 13 left in stock - order soon. Fortunately, the higher energetic part of UV-B; 280 – 295 nm, is filtered by the stratosphere and does not reach the earth’s surface, UV-A (315 – 400 nm), has energy between 389 and 300 KJ mol-1 and is less harmful for organic materials than UV-B. Visible (400 – 760 nm). and infrared (760 – 2500nm.) For small households with wells: HQUA-TWS-12 Ultraviolet Water Purifier. (Cheap, Easy to Install, for up to 12GPM Flow Rate) > See Review. Best for city water: Acuva ArrowMAX 2.0 UV-LED Water Purifier. (Low Maintenance & No Bulbs to Replace for up to 10 years) > See Review. Budget under-sink option: iSpring UVF11A. to fi lter the UV light to insure the best protection, visability and comfort. The proper choice of amber color will depend on the exact application. Shown below are light transmission curves of ACRYLITE GP and FF sheet amber colors 2C04 (old 408-5), 2C62 (old 462-4), and 1C22 (old 430-7) which provide good UV absorption characteristics. Common building codes require PEX to be at least 18 inches away from water heaters to protect the plastic piping from melting. It’s important to protect your PEX with pipe insulation, abrasion clips, or enclosed in a larger pipe. This will stop any friction from happening which, over the years, can cause holes in the PEX. Filter specifications can be permanently engraved on the window. Custom sizes and shapes are available. This laser safety viewing window meets and/or exceeds US ANSI Z136 standards for use with lasers. Plus, this laser protective acrylic sheet is available with 0.140″ and 0.250″ Thickness. Maximum Sheet Size 24″ X 36″ OD 5+ @190-532nm This green cast is imparted by the pres¬ence of small amounts of iron and chro¬mium oxides in common silica. These oxides result in UV transmission of 58% for a 3/8-in.-thick sheet of glass. Put another way, this glass absorbs 42% of the UV light that hits it. xsJnamb.