CITIZEN Original Surface Treatment Technology “Duratect” Development of New Technology “DLC-BLUE”

Abstract

  “DURATECT” is Citizen Watch's proprietary surface hardening technology. “DLC-Blue” was developed as a new color for “DURATECT”. “DLC-BLUE” uses diamond-like carbon technology to configure a titanium or stainless steel surface with an adhesion layer, a DLC layer, and a transparent DLC layer, which causes interference of light and achieves a blue color. It has been confirmed that the new “DLC-BLUE” maintains the excellent hardness, scratch resistance, and corrosion resistance of the conventional “DURATECT DLC” while expressing an unprecedented blue color.