The Doctor 46 Image Mug. 100% Dishwasher and Microwave safe. Great Birthday Or Novelty Gift. - What is sublimation? Sublimation is a transfer process in which the image becomes a part of the actual item. Sublimation needs special ink, paper and specific substrates with polyester coating to work. When heated to high temperatures, sublimation ink turns into a gas. Pores of the polyester coated item open up and allow the gas to enter. Then, once removed from the heat, the pores of the polyester substrate close up, trapping the ink inside. The entire image will be smooth to the touch.
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