pronca 0 Posted October 27, 2021 I have been making tumblers for a while with sublimation, but have been having this problem only on this one design. I'm trying to sublimate a black background design onto a white tumbler. Every time I do it I get white spots around the top and bottom of the tumbler. I've tried it 4 times and it happens every time. I'm rapping it super tight and using shrink wrap to seal it, then I tapped the whole thing. Nothing works. Has anyone had this same problem and what can I do to fix this? Share this post Link to post Share on other sites
Dakotagrafx 7,297 Posted October 27, 2021 use cactus wraps in stead of a mug press - the bottom and handles wick away the heat but in an oven the entire mug is heated evenly. part 2 is buy quality mugs - not the cheapest you can find as the coating has to be applied evenly for the product to come out evenly Share this post Link to post Share on other sites