1. Electronic reversing valve, extremely high detection accuracy and service life. 2. VM central viscosity control system, centralized display, product source traceability, intelligent communication. 3. The temperature control system controls the viscosity of the ink and controls the temperature of the ink at the same time. The system is controlled by an independent unit, with high precision and easy operation. It adopts a non-contact heat exchange module, which is safe and efficient. 4. Automatic ink replenishment system, automatically dispenses ink according to the recipe set by the customer, especially suitable for white ink.