The printed colors on the packaging bag are inconsistent. What should I do?

Yes For a packaging bag to have bright vibrant colors, even ink color 、 clear patterns, only then can it be considered a good packaging bag. Printing color difference also is a factor affecting the quality of packaging bags one of the important factors. In the whole printing process of packaging bags the ， packaging bag reasons for printing color difference are multifaceted, including poor technical factors and raw material factors. How can we avoid deviations between the finished product and the design draft after printing? Below, Shunxingyuan Packaging, a professional flexible packaging manufacturer, combines its own experience in producing and printing exquisite packaging bags to summarize how to prevent color difference in packaging bags, and let you see how exquisite packaging bags are printed.

1. Printing color difference caused by improper pressure

The ideal printing process is based on "three flat", so that a thinner ink layer can be used to achieve a more uniform ink color on the printed matter through the effect of balanced printing pressure. When the printing pressure is insufficient or uneven, and there is poor contact between the backing material and the printing plate, the ink supply needs to be increased to meet the visual effect of the plate inking. However, this will not only increase the ink consumption, but also easily cause printing color difference and sticking problems in the printed matter.

2. Printing color difference caused by poor ink rollers

In flat printing, letterpress printing and other printing processes, the quality of the rollers plays a crucial role in whether the printed matter can obtain a uniform ink color. Machines that print color printed matter generally have three types of rollers: inking rollers, distributing rollers, and impression rollers. Among them, the inking rollers and impression rollers have a greater impact on the ink density. The elasticity, viscosity, concentricity, hardness, and surface smoothness of the ink rollers largely determine the ink color quality of the printed matter. If the impression roller has poor elasticity, insufficient viscosity, eccentric roller body, excessively hard colloid, and poor colloid smoothness, it is easy to cause uneven or unstable inking during the printing process, resulting in inconsistent ink color in each printed sheet.

3. Ink Printing color difference caused by poor quality

Process conditions show that improper ink layer thickness and viscosity are prone to printing color difference. During printing, only with a moderate and uniform printing ink layer can the ink color quality of the printed matter be better guaranteed, and the occurrence of printing sticking faults can be effectively prevented. If the printing ink layer is too thick, its viscosity will increase accordingly, which is easy to cause paper powder dropping and fuzzing during printing, thus affecting the uniformity of the ink color of the printed matter. However, if the printing ink layer is too thin and the viscosity of the ink is too low, the ink color of the printed matter will appear light, and the visual effect of the printed matter will be poor.

Long press the QR code to follow, Customize your exclusive packaging

www.dgsunpak.cn  packaging bag