This clear acrylic sheet has UltraViolet (UV) filtering properties to protect and preserve artwork, fabrics and other materials from the harmful rays of the sun and overhear lighting. The P99 finish is on 1 side and is considered a "non-glare" finish. ACRYLITE¨ UV filtering (OP-3)Êsheet is pure protection from the irreversible effects of UV damageÊfrom both natural and artificial light. Continuously-manufactured ACRYLITE UV filtering (OP-3) sheet filters out 98 percent of damaging UV rays, protecting fine artwork, prints and documents from fading, yellowing and brittling. The UV protection is part of the sheet, so it won't scratch off!