How do I protect and maintain a yellow carbon katana for long-term display?
Updated Feb 2026
Maintaining a yellow carbon katana for long-term display requires a routine that protects both the high-carbon steel blade and the yellow color elements. For the blade, establish a consistent oiling habit: after any handling session, wipe the full blade with a soft lint-free cloth to remove fingerprints and moisture, then apply a thin protective coat of camellia oil or mineral oil and buff away the excess. High-carbon steel in any grade will develop surface oxidation if left without oil protection, and this applies to yellow blade treatment pieces as much as to conventional finish katana. Use only soft cloths for blade contact and avoid any abrasive materials that would damage the yellow blade treatment surface. For yellow lacquered scabbard pieces, protect the scabbard from water contact and avoid dropping or knocking the scabbard against hard surfaces that could chip the lacquer. Avoid direct sustained sunlight on the display position, as UV exposure fades yellow color treatments over months. Store in low humidity and moderate temperature.