Sorry, I asked for help too quickly. I figured out the problem. It was my own mistake.
I have always used (and loved) Crescent Rags, but I mistakenly ordered some of the solid rag this time. And then I tried doing something I've never tried before, so I compounded the problem. Not at all unusual for me.
The solid rag was just too soft for what I was doing. It shredded a bit. Then I cut some of the Tru Vue UltiBlack and it was stunning. So, of course, I want them all to look like that now!
The reason for my Bainbridge question was because I thought someone had said that it cut crisper than Crescent.
Ron, thanks for the matboard refresher course! I just took my Tylenol. Shall I send you a couple?
And Jerry Ervin, you have responded to every one of my posts so far. Thank you!
Betty Newman said I would find some nice people here.