Sharing of Evaluation Standards for Plastic Bag Printing Quality

According to plastic bag manufacturers, although the popularity rate of plastic bags is very high, in fact, most consumers only know the quality of plastic bags from the aspects of shape design and appearance, and they really understand the quality of plastic bag printing. There are not so many evaluation criteria. Today I want to focus on analyzing and interpreting this topic with you.

The first point of the plastic bag printing quality evaluation standard is the requirements of the pattern. Specifically, the pattern should be clear and complete, and there should be no stains left by ink on the surface of the plastic bag. At the same time, the printing color number must be developed in accordance with the single color number of the process designed at the time. There must be no chromatic aberration in the color. In addition, the printing location should be arranged exactly as originally designed.

The second point is that there can be no large-scale printing secondary dots. The so-called secondary dots are insufficient dots. The maximum allowable value is 20 per square meter.

Third, the ink peeling rate must be less than 20%. It should be reminded that in the above three plastic bag printing quality evaluation standards, the third point is the most difficult to understand the ink peeling rate. If you are a novice, it is best to start with the formula that is A (ink peeling rate) = S1 Start with /S2*100%, and then from a practical point of view to see how the details should be grasped after you have figured it out.

In some people’s opinion, plastic bag printing is a job without technical content, and it only needs to supervise the machine to execute it step by step. In fact, it is not. After the printing is completed, it is necessary to check whether every detail of this batch of plastic bags has reached the required standard through random inspections, otherwise, it will be “rebuilt”.


Post time: Aug-30-2021
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