Surface treatment

 Watch black (blue), passivation, electrolytic polishing, chrome plating, hard chrome plating, silver plating, gold plating, nickel plating, mechanical polishing, QPQ, spray painting, powder electrogalvanizing, chemical oxidation, anodizing (natural color/dyeing), hard anodizing, nickel plating, electroless nickel plating, trivalent chromium passivation, WS2 coating

Sand blasting, wire drawing, line polishing, random polishing

Heat treatment

 Quenching, tempering, annealing, vacuum heat treatment, bright heat treatment, aging treatment, multistage heat treatment, solid solution heat treatment, tempering treatment, nitriding treatment, low temperature treatment