Japanese Crystal-Toishi (Whetstone) – #1500 (Yellow) – For Japanese Kintsugi
These whetstones are highly specialized tools, ideally tailored for the precise polishing of urushi lacquer layers. #400/#600 is well-suited for mugi-urushi (wheat powder & raw urushi) blended with elm (wood powder), known as kokuso (blending ratio 1:2).
