How should I care for a Damascus tachi kept on display?
Updated Mar 2026
Damascus patterned blades require consistent but minimal care to maintain their appearance. Every three to four months, apply a small amount of choji oil (or a food-grade mineral oil substitute) using a soft, lint-free cloth, spreading it in thin strokes along the flat and shinogi-ji. Buff lightly so no excess pools in the hamon area. Keep the blade in its saya when not being examined — the lacquered wood regulates minor humidity fluctuations. Avoid displaying near heating vents, windows with direct sunlight, or coastal environments with salt air, all of which accelerate surface oxidation. If the olive Damascus pattern begins to look dull or flat, a single careful re-etch by an experienced bladesmith can restore contrast without harming the blade geometry.