A means of transferring a design to a substrate using an intermediate step. In heat transfer printing, a design is printed in reverse (typically by screen printing) on a special release paper using a plastisol-based ink (or other type of sublimable dye). The printed image is then placed against the desired substrate (commonly a fabric, such as a T-shirt) and subjected to high temperature (commonly ~190C/375ºF) and pressure (60 pounds/~30 kg) for a short period of time (10-15 seconds is common). After the substrate has cooled, the release paper is peeled away and the image will have been transferred to the substrate. This process is commonly used for "iron-on" decals. Also known as screen flex heat transfer.
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