The Scotch 3M Photo Mount 10 oz. is the safe way to permanently mount valuable photo papers, including Cibachrome and RC. The photo mount is pH neutural and photo safe. It is ideal for reproductions, illustrations, maps, posters and signs. It is also, safe for your most valuable work - won't show through, discolor, bleed or wrinkle. It resists heat and moisture for a stronger permanent bond.