Look at the two pieces of fabric both 2 yds. that I found at Goodwill. Luckily, I tested the first one before putting it in the washer for the jeans wash. There was so much excess dye that it took two rinses and a complete wash with Synthropol to get the water to run clear.
This one did no bleeding. They are both cotton. It's fun to get a bargain but always a wise idea to test things.