This post was on the shorter public Facebook group, kindly posted by Mandana Barkeshli. The paper was researched and written by Mandana Barkeshli, Marinita Stiglitz and Sadra Zekrgoo. I am ever so grateful to them for providing this information! Enjoy the peacock ink recipe especially, and see if you can make this beautiful deep peachy pink dye (safflower plus alkaline) - I'll work on this too, maybe in summer when it's hotter.
Wow, arrowroot starch! How do you prep it? Do you cook it like flour?
I enjoy running tests on sizes for optimum line finesse (lack of bleed) and starch and animal glues are great. I'd love to try serish someday, and cucumber mucilage. I'm growing hollyhocks for the purpose, too.
The bleeding upwards reference was concerning color seeping upwards into layers painted above with wet-ish colors. You're right, though, I should assume it stays put and doesn't migrate upwards, since tea stain doesn't, and it wouldn't have survived as a paper dye if it did. It's just astonishing that such a brilliant color should stay put!