Photographic Solutions PEC-12 Photographic Emulsion Cleaner (2 oz Bottle) New bottle design and size, dropper tip not spray bottle, now 2 oz. size Pec-12 evaporates almost instantly without affecting the emulsion Pec-12 intended for use with contemporary, hardened silver-base films (slides and negatives) and papers (color, B&W, fibre, RC) Pec-12 cleans film or print surfaces of non water-soluble stains, including ball point ink, most permanent ink and finger oil