The fundamental reason why digital direct injection machines have not been widely used. Although the problem of printing cost can be solved by combining silk screen printing and digital direct injection, new problems have been exposed. Silk screen is not environmentally friendly, and stricter and stricter environmental protection supervision, silk screen can only go underground. 3. Color fastness The color fastness of digital direct-injection printing for light-colored fabrics is completely fine, but there is still a lot of gap between digital direct-injection printing and screen printing for dark-colored fabrics. 4. Efficiency Currently, the daily output of digital direct-injection printers on the market is generally around a few hundred pieces. In the case of fewer colors, there is a very big gap between the efficiency of silk screen printing.