Thanks, Waldronate!

You are probably right about the "multiply it by 100 times" problem. I'm planning to get rough Arches paper and some distress inks and give it a shot. I'm hesitant to use real tea (or coffee) because the acid will deteriorate the paper in the long run (100 years?!?).

P.S. My better half seems to have plenty of free time, maybe I get her involved.