Applying a thin layer of shitaji over the shaped kokuso fill - 刻苧の上に薄い下地層を施す作業

Because kokuso is quite coarse, a thin layer of shitaji, an urushi-based material that incorporates fine clay, was applied to increase the smoothness of the surface of the fill.

荒い刻苧の上に薄い下地層（漆に細かい粘土粉を混ぜたもの）を付け、充填部の表面をなめらかにします。