We started making our own t-shirts several years ago for fun. We were having them made by a screen printing company who used ink, but then had the idea of making our own using pine tar. So basically we are staining the t-shirt with the very same Swedish pine tar we use in the soap. :D
Printed on a very good quality Kirkland 100% cotton white t-shirt.
Note: They run pretty true to size after going through the washer and dryer just once.