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natural stones act that way too. i was informed by So Yamashita that you want to use a hard stone so that the slurry breaks down faster than new slurry is produced. a hard stone releases less...

this is true. if you keep the stone clean it will be 8k if you use it with slurry it will grind down to 12k. how fast this happens i don't know, and will you overhone your razor trying to get it to...