PresTax is a superior, pH neutral , pressure sensitive mounting board that is simple, fast and economical to use. It requires no tissue, no heat, and no special equipment. It is a must for people in the photographic, fine-art or commercial art fields. Peel back the release sheet, position the artwork or photo and firmly press down, smoothing over the entire surface. PresTax by Savage is perfect for mounting prints, watercolors, photos, etc. Available in four weights: Light, Medium, Heavy & Extra-Heavy.