Problems to be aware of when simulating a proof

1. Firstly, 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. Attention should be paid to the problem of overprinting, and the overprinting is not allowed to have mechanical reasons and human factors.
3, pay attention to the "branch" problem, "branch" is generally caused by friction.
4, pay attention to the paste problem, resulting in paste version is mainly due to the rubber roller pressure is too large, there are too thin ink adjustment, too much oil or too much auxiliary materials, too much ink and so on.
5, pay attention to the problem of heaping ink, causing the cause of heaping ink is not suitable for pressure, rubber blanket is too strong, poor ink mixing, viscosity is not appropriate, too dry oil and paper off powder and other reasons.
6, pay attention to the color sequence problem, proofing paper and printing paper as uniform as possible, proofing the color sequence and printing color sequence.