... Q.6: What is the process craft of color changing mugs?A.6: There are four basic crafts as below:- (a). Direct printing: ... spraying printing, thirdly put the transferred paper into the water, picture leave the paper, fourth stick the picture on the mug, then bakeout made ... c). Heat transfer: Stick the heat transfer paper on the mug, and use the mug baking machine bake the picture on the mug. It takes 3-4 ...