I used to print my own fabric, but we always used poly-blends. The polyester opens up the its pores when heated and allows the special ink to soak in. When the fabric cools the "pores" close and entrap the ink. This won't work on other fibers. That was about 25 years ago, so they may have come up with some new technologies by now. The poly fabrics could be washed, but it was instructed that they air dry.