I love drawing tshirts – although I haven’t done many for myself, they’re a staple in my gift repertoire. My most recent venture in that regard though was horribly disappointing – I used goopy light-on-dark dimensional paint, and less than a year later it’s almost completely peeled off the tshirt in question.
I have been very happy with using fabric paints that soak in for dark-on-light illustrations, but now I’m trying using bleach to create light-on-dark patterns. My housemate suggested using a dip pen, and here’s the results so far! On this particular blue tshirt the results are slightly orangey or pinkish, but the detail is great, and I look forward to experimenting further.