Simulation proofing should pay attention to what the problem?

1) First, it is required to print according to the standard when printing the pattern, and at the same time, the factor of the dot enlargement during the proofing should be taken into consideration. Note the dot gain due to ink emulsification. Also note that the blanket is not tightened, and the dots caused by excessive pressure between the plate and the blanket cylinder increase. 2) Note that overprinting is not allowed, and overprinting is not allowed to have mechanical and human factors. 3) Pay attention to the "contracted" question. "Belted" is generally caused by friction. 4) Pay attention to the problem of stencil, the main cause of stencil printing is that the squeegee has too much pressure, the ink is too thin, the oiliness is too large, too much auxiliary material is added, and the ink volume is too large. 5) Pay attention to the problem of heaping ink. The cause of piled ink is that the pressure is not suitable, the rubber blanket is too stiff, the ink is stirred badly, the viscosity is not suitable, the dry oil is too much, and the paper is powdered out. 6) Pay attention to the color sequence problem. Proof paper and printing paper should be as uniform as possible. The color sequence and color sequence of the proofing should be unified.