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 (MATERIAL FOR FORMING A SURFACE COATING TO RESIST AN ETCHING MORDANT), [ ALBUMEN, WAXES, ] ETCHING POWDER, DYE REMOVER, RETOUCHING DYE, ALCOHOLS, DYE SOLUTIONS, ACID SULPHITE SOLUTION, TALCUM FOR PHOTOENGRAVING USE, DEVELOPERS FOR PHOTO...
Expired · March 22, 1949 · 71575840 ·