When the transfer paper is brought into contact with the fabric in a heat press, the ink embedded in the paper is converted to a gas and penetrates directly into the fibers of the substrate. The printer prints on transfer paper that has a coating designed to hold and then, under heat and pressure in a heat press or calendar, releases the printed image. They are two primary methods of dye-sublimation printing, transfer printing and direct dye printing. The process results in continuous tones of vivid, photographic color, as the inks in their gaseous state enter into the substrates pores rather than being deposited on the surface. As the substrate cools, its pores close, permanently locking the inks into the fabric. When heat is applied, the pores of the substrate open up, allowing the gaseous dye to flow into the open pores.
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