1. The hardness of the rubber plate of the flexo printing machine is determined by the temperature, pressure, pressure time and so on during sulfur hardening, and the hardness of the plate can be determined according to requirements. The hardness of the photosensitive resin plate depends on the hardness of the photopolymer, which can be controlled by adding a hardness control agent. Elasticity is the inverse index of hardness, that is, the higher the hardness, the smaller the elasticity.
2. Different substrates have different hardness requirements for the printing plate. Printing plate elasticity is large, the contact with the substrate is uniform, the ink color of the printing is also uniform, but the level of image reproducibility is poor, and the dot expansion is more significant. Substrate surface smooth, plate elasticity to be small; If the surface is rough, the plate elasticity should be large. Printing field or text, printing plate elasticity should be larger; Printing dot or thin line, plate elasticity should be small.
3. Flexo printing machine plate elasticity in the printing process will have a certain degree of change, that is, after high speed and long time continuous printing, plate elasticity is reduced, insufficient rebound, in order to avoid plate elasticity is reduced too much, it is required to maintain light printing pressure state when printing.
