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There is 10% extra binder by weight compared to the usual version with corresponding increase in resistance to wear
or mixed with suitable binder to create a polishing compound
The light colour is desirable and the wholesale cost of the stone was increased as a result
The #1000 has been reformulated for greatly increased hardness and wear resistance
The diamond layer is 10mm thick after firing
Mikawa Nagura 2015g There is 10% extra binderMikawa Nagura are Tuff stones, a type of igneous rock formed from lithified volcanic ash. Mined in Aichi prefecture starting 700 years ago, they have been used in traditional Japanese sword polishing progressions. The mine has been closed since the 1970s. We receive the stones from the wholesaler with rough chisel marks on both sides, and flatten them in our workshop. Although we have made a good effort to provide a flat surface for usage, we strongly