This glue resist dye technique is amazing – the results come out so cool! Take a dry, prewashed shirt and draw designs using white glue gel. Let it dry and then apply your dye as usual, according to the package directions.
Let it set flat or even better, hung on a hanger for six hours. Cover with plastic. Then rinse it out in the sink, rubbing off the glue (it will melt from the water). Then wash in cold water and hang dry.
This is the dye kit I use for all my tie-dye projects!