Dear Patrick,
Thanks for your inquiry. Approx. micron size for grits follows:
150 grit - 100 micron
240 grit - 60 micron
320 grit - 45 micron
400 grit - 40 micron
600 grit - 30 micron
Our stones are manufactured for industrial applications, so we do not have much knowledge concerning knife sharpening applications. I understand that our stones have been recommended on several blogs and articles, and we have received many orders for our MoldMaster and Ruby stones in the coarser grits for initial rough cut and our FLEX stone in 400 or 600 grit for a finishing stone.
Best regards,
CONGRESS TOOLS, Inc.
Mark Froelick
In a message dated 5/19/2012 7:43:04 P.M. Eastern Daylight Time,
info@congresstools.com writes:
Name: Patrick Roos
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loonybin@ar15.com
Comments: I am interested in some of the Moldmaster stones and I have some questions:
1) what micron size are the 120, 150, 240, 320, 400, and 600 grit stones?
2) how effective are these stones for sharpening knives made of s30v, D2, and CPM-M4 (I'll be using an Edge Pro Apex sharpener)?
Thanks!
Patrick