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Now that I'm not in a hurry. Most toothpaste is in the 3 to 10 micron/micrometer range, that is still plenty bad for a shave ready edge. Chrome oxide, Iron oxide, and French chalk are some of the...

Toothpaste, the white past, is basically diatomaceous earth which has a large variation in particulate size up to 200 micrometers. Thats a whole lot coarser than 8k. I did the same thing :) but had a...