I got a few of these as part of a Christmas present. Was working on cleaning the cars yesterday after the winter. I had a few in the detailing bag, never washed. I had some crud to clean up that I did not want to use the good towels on. Used the utility towels, they worked fine. Threw them on the pile on top of the dryer with the rest of the damp/wet towels when done. That is when the issue occurred.
Today I went to throw stuff in the wash. The black dye had bled into the white waffle weave and doublesoft towels. I should have known better, so I now have my white towels in bleach water to hopefully get them looking better. My main concern is the dark towel stain on top of the white metal dryer. Yes, I have a stain in the white enamel paint on the dryer. I worked on it with bleach and magic eraser, but so far, still there.
If you buy these towels, wash immediately separately and don't let them anywhere near a light colored surface.