INSTRUCTIONS FOR COLD DEVELOPMENT OF THE PAPERS KNOWN AS AA, KK, CC, EX, HS AND EX. HR:
Philadelphia: Willis & Clements, [1880 - 1910]. Single sheet, 7 x 23 inches, accordion folded to make 14 printed pages. Very good. Essentially a trade catalog, which provides general instructions for processing and presenting Willis & Clements' various platinotype papers, with a price list for the papers and various mounts..... More