What printing and dyeing methods were there in the Tang Dynasty?

Beautiful clothes are inseparable from dyeing. At the beginning of the Tang Dynasty, the government set up a weaving and dyeing department following the Sui Dynasty, specializing in textile printing and dyeing for the imperial palace. The most popular printing and dyeing methods in Tang Dynasty are twisted valerian, wax valerian and clip valerian. When printing and dyeing with clips, two hollowed-out templates should be used to clamp the cloth to be dyed, and then different colors should be dyed at the hollowed-out places. In addition, resist such as wax can be coated on the hollowed-out part, and then the cloth can be immersed in the dye vat. After the wax is removed, the covered part will be covered with a white pattern.