CHEMCO
CHEMICALS AND CHEMICAL PREPARATIONS, PARTICULARLY FOR USE IN PHOTOGRAPHY, PHOTOENGRAVING, LITHOGRAPHY, ROTARY PHOTOGRAVURE, AND OTHER PHOTOMECHANICAL AND RELATED ARTS-NAMELY, ACIDS, SALTS, BASES, SENSITIZERS, SOLVENTS, SYNTHETIC OR ANILINE DYES, RESINS, RESISTS, ALBUMEN, ETCHING POWDER, ALCOHOLS, DYE SOLUTIONS, ACID SULPHITE SOLUTION FOR PHOTOGRAPHIC, PHOTOMECHANICAL, AND PHOTOENGRAVING USE, DEVELOPERS FOR PHOTOGRAPHIC PAPER AND FILM AND COMPONENT CHEMICALS, DEVELOPERS FOR PHOTOMECHANICAL RES...
Expired · February 16, 1950 · 71592546 ·