Jack:
Thanks ... I had already found this on your site, and it is the best document I have found so far.
But where did it originate? Certainly, somewhere back in time, there was an official designation for this. Otherwise, who deterimines whether an edge #1 (or any other edge) is "good" or "bad", and how would you be able to show compliance? MIL-S-13165 requires the number 1 square edge, so this requirement has been around for quite awhile. Surely an industry spec ... or perhaps some sort of steel rolling mill bible ... spells this out.
John Z.
