How should I store a double-edged tanto long-term?
Updated Mar 2026
Keep the blade in its saya whenever it is not actively on display — the saya shields both edges from ambient dust and incidental contact. Apply a thin coat of choji oil or food-grade mineral oil to both edges every three to four months, wiping off the excess with a clean cotton cloth. Avoid rubber or foam-lined cases for extended storage, as many foam formulations off-gas acids that accelerate surface oxidation on carbon steel. If your storage environment experiences humidity above 60%, place a small silica gel packet inside the display box and replace it seasonally. Never store a tanto in a leather sheath long-term; leather retains moisture and can cause pitting on polished steel surfaces.