CHEMICALS EMPLOYED IN METAL COATING, BRIGHTENING, AND ELECTROPLATING BATHS-NAMELY, CHROMIC ACID, NICKEL SALTS, CHROME ADDITION AGENTS, ZINC PURIFIERS, NICKEL ACTIVATORS, ACID REPLACEMENTS, BUFFS, AND MAINTENANCE MATERIALS; WETTING AGENTS; FUME AND MIST SUPPRESSORS; RINSING AGENTS; DEOXIDIZERS; DYES; AND PROTECTIVE COATINGS APPLIED TO METALS BY MEANS OF CHEMICAL COATING AND ELECTROPLATING BATHS