The special heat transfer ink is used to print various patterns on a special paper, and then transfer the patterns to the product through temperature and pressure. This special paper in the heat transfer process is called heat transfer paper. Transfer printing refers to the printing process of transferring dye to fabric by transfer paper. It is based on the sublimation characteristics of some disperse dyes, and selects the disperse dyes sublimated at 150-230 ° C, and mixes them with the slurry to make "color ink". According to different design pattern requirements, the "color ink" is printed on the transfer paper (this is a special paper, so called transfer paper). Then, the transfer paper with pattern pattern is closely contacted with the fabric, and the transfer paper with pattern pattern is closely contacted with the fabric to control certain temperature and pressure And time, through diffusion into the fabric interior, thus achieve the purpose of coloring.