ACRYLITE OP-3 sheet is pure protection from the irreversible effects of UV damage. It protects from both natural and artificial light. Continuously-manufactured ACRYLITE OP-3 sheet filters out 98% of damaging UV rays, protecting paper-borne artwork, prints and documents from fading, yellowing and brittling. ACRYLITE sheet's UV protection is part of the structure of the sheet, it can't scratch off!