What is the difference between a proofer and a press?

The printing machine is quite common to us, but we are definitely stranger to the proofing machine. It is not easy to understand the name. Then, from the comparison with the printing machine, what is the proofing machine?

The main difference between proofing machine and printing machine is:

1. The structure of the proofing machine is different from that of the printing machine

The printing method of the proofing machine is round and flat, and the printing method of the printing machine is round and round. The structure of the ink for the proofing machine is not perfected by the printing machine. Therefore, in the aspect of ink balance and image level, the sample proofing and printing of the proofing machine There will be a certain gap in the printed matter of the machine.

2. The printing process of the proofing machine is different from that of the printing machine

The sample is continuously printed on the printing machine, and becomes intermittent printing on the proofing machine, and the printing machine is printed in wet-wet mode, and the proofing machine is intermittent printing, so it is generally carried out by wet pressing. The different printing methods of the proofer and the printing press determine that the proof has different effects.

There is no paper-receiving and paper-feeding process on the proofing machine, but there is a printing machine. This causes the paper to be deformed and the paper cannot be smoothly fed when the paper is fed. When the printing is finished, the ink layer is not dried when the paper is delivered. Through, it will cause the sample to be very sticky, and then become very dirty, so the opportunity to use the dusting method to prevent sticking when picking up the paper.

The printing speed of the proofing machine is relatively low, and the printing machine is operated at high speed. For example, some samples need to have a certain thickness to achieve a certain effect, which can not be achieved at high speed printing, and some thin inks are difficult to control in high speed printing, which may cause damage.

The printing pressure of the proofing machine is small, and sometimes the same paper can be used normally on the proofing, but peeling occurs on the printing machine.

3. Other aspects

Generally, the proofing on the proofing machine is smaller than the proofing machine. In multi-color printing, the ink ratio of the proofing machine and the ink ratio of the printing machine have a large color difference. The film selected by the proofer is a single imposition, and the film used in the printing press is usually multi-imposed.

Therefore, the proofing machine should take into account the problems that may occur in the printing press and make appropriate adjustments so that the products printed on the proofing machine are close to the proofs printed on the printing press.

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Electric Linear Actuator

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