Take the black shirt, and using bleach- bleach the parts you would like to tye-dye-let the bleach sit for 24 hours
the using regular colored dye-dye t the bleached parts of the shirt
You can not dye black material.
However, you can remove some of the dye of a black cotton garment using bleach or a product known as Discharge Paste. Then you can tie dye or paint with dye on the...