gudy 831 is a pressure sensitive cold mounting adhesive in a roll form that can be used to make most any smooth surface self-adhesive. Perfect for mounting photos or other heat sensitive graphics gudy 831 can be applied without the need of heat or expensive machines. One of our most aggressive adhesives gudy 831 has a traditional construction using a non-woven paper center that is coated on both sides with our own high tack acrylic adhesive. gudy 831 is both acid and solvent-free and has passed the Photographic Activity Test (per ISO 14523) making it ideal for permanent archival mounting of photographs. Now from Scientific Notebook Company. Archival quality sewn bindings.">