The appearance of color printing packaging box can not only make the publicity function of the product more diversified, but also improve the quality of the product. There are several printing methods that need to be understood when printing. Here is a detailed introduction to everyone, hoping to help you.

1. Post printed color printing packaging Flexographic printing slotting machine mode

This printing technology, commonly known as the watermark machine technology, has been developing very slowly since it was introduced in the 20th century. The screen printing is adopted, and the ink layer is very high. It is easy to wear during transportation, and will cause environmental problems, so it is gradually eliminated.

2. Preprinted sheet fed lithography

The characteristic of this printing method for color printing packaging is that the printing quality is very good. If it is lithographic printing, it can be printed to 175 lines/inch. There are many lithographic preprints in China, which is estimated to account for 30% of this field at present.

3. Preprinted web flexography

The number of printing plate lines of this printing technology is between 120-150 lines/inch, and the printing quality is good. This method is a very popular printing technique in the world at present, and this technology will develop rapidly in recent years.

4. Lithographic printing

Color printing packaging has opened up a new way with the development of the times. That is the lithographic printing method of back printing. As the name implies, the requirement of lithographic printing is that the substrate is even in thickness, high in stability, and smooth in surface to meet the packaging requirements of many commodities.

Color printing packaging box is a very common packaging product. It can not only protect items, but also play a certain role in publicity. When printing, there will be color inconsistency due to some factors, which will affect normal use. What is the cause of color inconsistency?

1. Check whether the document is consistent with the sample sheet. If the color of the same document of the same product cannot be kept up after two times of printing, this factor can be basically excluded. If the document is reproduced, this factor is the main factor.

2. If it is traditional printing, refer to the parameter of exposure and development is changed incorrectly.

3. For the paper factor, if the whiteness and hue of the printing paper are very different from the sample paper, it is certain that the color will not catch up. At this time, it depends on whether it is necessary to replace the paper.

4. Ink factor: the brand of the ink used for printing is different from that of the sample ink, and the primary ink color of different brands is slightly different.

5. Operational factors. Improper control of ink wash balance, printing pressure and other operations during the printing process will cause color to lag behind. A better way to control operational factors is to add a "measurement and control strip (control test strip for density and dot gain)" to the edge (tail) of the printed sheet, In the process of color printing, packaging and printing, attention should also be paid to measuring the field density and dot gain on the measurement and control strip.

The above is the reason for the color inconsistency of color printing package printing. We should pay attention to correct typesetting and control of ink usage in actual operation to prevent the printing color inconsistency caused by unexpected circumstances from affecting product quality.