Soak fabric in water first, then squeeze out excess water before putting in tea bath. It will accept the colour better. Oooohhh will try this on one of my planned makes, I've some lightweight cotton flags I want to make into a dress.
fabric printing with bleach/Dyeing fabric with bleach. Applying ordinary household bleach to dark, natural-fiber fabrics, either by spraying or brushing the bleach on flat fabric (Resist-and-spray technique), or by dipping the fabric in it, after protect