Lac
I dissolved lac in a little of hot water and added to three different pots. One is lac alone, the other lac and cream of tartar, and the third lac and soda ash. The last pot is lac with after bath of iron.
Results on cotton and silk (first is lac alone):
Results on raw silk: lac with soda ash on top, lac with cream of tartar middle and lac alone bottom.
Eco-printing with lac:
Eco-printing with lac+iron: