Quebracho + onion skins
I dissolved quebracho extract in warm water (not too hot, hard to dissolve) and then added to the pot of water. Added onion skins (that had been used before for another dye bath). Added the fabric and simmer for two ours.
Rinsed the fabric.
Results on silk and cotton:
Quebracho alone and quebracho+onion on raw silk:
Eco-print on cotton paper with quebracho+onion: