My husband and I used to have a business of fabric painting on ties and tee shirts. We used Delta Fabric Dyes, and after we ironed them (used a paper towel between iron and paint, we had no problem. My husband has a shirt I painted him in 1981 that the paint is still perfect on it even though it has been in the washing machine and dryer probably 100 times. I don't think they even make Delta Fabric Dyes any more, all I've seen recently are Delta Ceramcoat Acrylics, but I haven't really looked for them.