And sorry for the math error. I meant that a tissue for an 8x10 negative gets a total of .4 grams of Ammonium dichromate. The actual tissue size is 9x11, close enough to call it 100 sq inches, so I use 0.004 grams per sq inch. The amount you use per sq inch is what I standardize on for my workshops, and I consider 0.0005 per sq inch to be about the lower limit.
But the B&S tissue has a much higher inherent contrast than my tissue I use and that I make for my workshops.
I use fixed out photo paper for my own work and for the workshops. So I have not witnessed the mirco-frilling...but will keep an eye out for it in the future.
Good luck in refining your process!