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11-10-2013, 07:20 PM #2
大平礦山合砥石 --- honing stone ( awasedo ) from Oohira mine
三十型 --- size ( type 30 = 205 x 75mm )
一本選 --- type of selection
white nagura looks like chu-nagura from Mikawa ( medium grit )
black nagura seems to be Tsusima Kuronagura
I think that Oohira awasedo is not a good choice for razor finishing even when it is very hard one.Last edited by Nikolay; 11-10-2013 at 07:29 PM.