Let me start out by saying that this is how I hand stamp fabric. It's not necessarily the correct way or even the best way. I haven't had too much experience with stamping on fabric, but I do have experience with relief printmaking. In general, I prefer to explore a process (as long as it's fairly simple) before learning the proper way to do it. That way, I'm driven by what works for the specific needs of my project, with the added result of keeping my mind open to exploring alternative routes.