Artificial Koma-nagura stone.
5th stone of the groundwork used before Uchigumori-do.
By Koma-nagura, the mark of Chu-nagura must be removed.
If the polishing work is not done enough on this stage, and the mark of Chunagura is remained, it is difficult to achieve the effect of Uchigumori-do.
White Koma-nagura can make you work efficiently. At this stage the Hamon has usually become clearly visible.
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White Komanagura-do is very soft.
Please do not keep it in water with sodium carbonate
for a long time. Otherwise, it will melt.
There is no problem to put it in pure water.
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Dimensions : 18 x 5 x 5cm
Weight : 860g
