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I'm not sure as to how the 8000 would be made (the factory I worked at never went this fine)

But it would be nice to know for the rest of us for future reference.

I'm pretty sure they wouldn't be using a resin process for a stone like this. Resinoid abrasives are usually found in thin, reinforced metal cutting wheels or thick walled cups using very coarse...

All depends on the manufacturing process.

I'm not sure how the Norton 8000 is made, but some grinding wheels/abrasives are made not by the traditional vitrification process (firing in a kiln),...