Not an expert by any means, but from what i was told, once you submit the item to be sublimated into the heat and press it, you cant re-press the item. I tried and wasted quite a bit of dog tags when i tried to sublimate one side, and then do the second side. Terrible results, and when I finally asked the question I was told that most of the coating that is put onto these items will not allow you to sublimate on it twice. The only exception to this sublimation rule would be the pressing of fabric, i.e. mouse pads, polyester and stuff like that. Good luck and Aloha