Found so many nice web pages where people share what they learned or developed. This one is using soy milk to paint or print on fabric. They soak overnight soy beans, bleander and strain and add (think only in tiny amounts of pigments of what will be used in day or 2 as it can go bad and really smell.
http://textileartscenter.com/blog/painting-with-earth-pigments-and-soymilk/ they also added gum tragacanth. Also listed things learned the hard way, and presoaked fabric in soy milk.
This has beautiful pics of yarns/fabric dyed with honysuckle berries