Thread: using a coarse stone to lap a finer one works because ...?

Originally Posted by thebigspendur

it's simple. A coarse stone will quickly flatten a softer stone. If you want you can then use a fine stone to put a polish on the stone. In my case I use a shapton flattening plate and I use carbide on it to quickly flatten and then use alumina to polish it off.

Thanks. You're using two concepts, I believe. coarse/fine and hard/soft. So when you say a coarse stone will quickly flatten a softer stone I'm presuming you mean a coarse and hard stone will quickly flatten a softer one?

I can be more specific. If I'm using a DMT 325 and Naniwa 5000, 8000, 12000 (with wet sandpaper thrown in along with a flat surface) how would you recommend lapping them before blade sharpening?

TIA

Crowden