What is the cause of dry plate washing in uv printing?

Although UV offset printing ink has high viscosity and poor fluidity, when the room temperature is too high or the humidity is too low, the viscosity of the ink will be greatly reduced and the fluidity will be enhanced after long-term high-speed printing, and it is easy to produce loose ink drops and ink drops. When the ink emulsification is too serious, the moisture in UV offset printing ink will affect the transmittance of ultraviolet radiation energy, thus reducing the conjunctival strength. Sometimes, although the ink is cured, there is still moisture in the cured ink film. Once the ink layer is rubbed or stuck with adhesive tape, it will be found that the ink layer is pulled off, resulting in ink pulling. Therefore, it is necessary to control the room temperature, humidity, printing speed and the degree of ink emulsification.