Sublimation printing is a process that transfers dye onto materials, typically fabrics, using heat and pressure. The dye is first printed onto a special transfer paper, and then, when heated, it turns into a gas that permeates the material. This method is popular for creating vibrant, long-lasting images on items like t-shirts, mugs, and phone cases. This technique works best on polyester or polymer-coated surfaces, as the dye bonds with the fibers during the heating process. Sublimation printing is favored for its ability to produce detailed designs with a wide range of colors, making it ideal for custom products and promotional items.