People keep asking how to use a Heat Press Machine Hot Bob Ross The Joy of Painting 36th Anniversary signature shirt . Some even ask what it is. A Heat Press Machine or Heat Transfer Printing is the modern, no-fuss way of printing artwork onto t-shirts. It is a great alternative to the classic screen printing. Of course, when it comes to quality and longevity, screen printing still wins the game. But for the regular customers’ point of view, they can’t tell the difference between a screen printed tee and a heat pressed tee.