Does black lacquer saya require special care during display?
Updated Mar 2026
Yes, and the key concerns are UV exposure and humidity. Prolonged direct sunlight causes the lacquer surface to yellow, fade, or develop hairline crazing over time, particularly on piano-lacquer finishes where the surface is highly polished. Stable humidity between 45% and 60% RH is ideal — very dry environments cause lacquer to contract and crack, while excess moisture can soften the binding between the lacquer layers and the wood core underneath. For long-term display, a UV-filtering case or placement away from south-facing windows makes a meaningful difference. A very light application of paste wax, buffed out to a thin film once or twice a year, helps protect the surface without altering its sheen. Never use silicone-based polishes, which can penetrate and discolor the lacquer over time.