Chouqin wholesale vacuum sealer bags take you to understand ink printing knowled

Water-based inks have always been of great concern in the industry. Water-based ink uses water as a dissolution carrier, which has significant environmental protection and safety characteristics, which is unmatched by solvent-based inks. This unique feature is being favored by more and more packaging and printing companies. Ink printing wholesale vacuum sealer bags are not only applied to the packaging of many organic food and agricultural products, but also to packaging bags for children's toys, and more widely used in food packaging bags. In order to better use ink, everyone should understand the requirements of water-based ink on the plate roller.

1. Ink has high requirements on the accuracy, smoothness, and electroplating layer of the plate roller. In many cases, the ink is dried slowly, transfers better, and the depth of the plate roller cell is shallow. At this time, the accuracy of the plate is not high. The ink layer cannot cover up the defects of the plate body, such as some common "car pattern", "washboard" and other problems are caused by this. The surface finish of the plate is not high, and the ink is not easy to scrape clean. Because of the excellent water-to-ink transferability, the ink attached to the surface of the gravure cylinder after the scraper is scraped can easily transfer to the printing substrate, which will cause the print to hang dirty. For this reason, wholesale vacuum sealer bags have to increase the pressure of the scraper frequently. If the hardness of the chrome layer on the surface of the plate roller is not enough, the service life will be shortened.

2. The depth and gradient of the high and dark tone parts are quite different from those of the solvent ink printing plate. The water-based ink transfers well, and the light screen reproduction is particularly outstanding. The ink in the gravure cell does not change significantly from the time the squeegee is scraped to the transfer, and the dots are easily reproduced completely. At this time, if the engraving parameters of the plate roller are still set according to the traditional solvent ink plate, it is easy to cause the contrast between the high and dark levels to be greatly weakened, and one tends to lose sight of the other. Wholesale vacuum sealer bags require that the gradient be steeper when making the plate, the darker part is slightly deeper, and the middle to high-key part is shallower. Only when this is taken into account, the high-key and darker gradient can be perfectly reproduced.

3. The dot expansion degree is larger than that of solvent ink. Generally speaking, the printing viscosity of water ink is lower, and drying is slower. In addition, there are various additives and alcohol cosolvents in the ink, so that the lines and writing in the printed pattern expand seriously. . As a result, the pattern lines of the printed product become thicker, sharp corners become blunt, positive characters become larger, negative characters become smaller, the handwriting is blurred, and barcode scanning fails, resulting in waste products. Therefore, we should take this into consideration when making plates of wholesale vacuum sealer bags, and make the lines appropriately thinner.

Chouqin packaging factory adopts water-based ink printing process to produce finished food packaging bags

　　The advantages of water-based inks:

　　1. High color density, bright and bright printing colors;

　　2. Because it does not contain organic solvents, the printing and packaging are safe and healthy, non-toxic and harmless;

　　3. The water-based ink production process hardly emits volatility to the atmosphere Organic gas (VOC), very environmentally friendly, which is unmatched by solvent-based inks