Kraft paper bags because of its environmental protection and unique retro style, often used by businesses for various occasions, out of the use of kraft paper bags themselves, businesses also hope to be able to use kraft paper bags to enhance product brand awareness. However, there will also be some problems in the printing of kraft paper bags, so how should these be avoided?

1. Selection of paper

Paper bag printing, in the selection of paper, try to choose a smooth surface, good flatness. Like domestic natural kraft paper, refined kraft paper, Nine Dragons kraft paper, Liwen K series of kraft paper, imported Russian Bratsk kraft paper and other kraft paper surface smoothness is better than other kraft paper. In addition, it is also necessary to judge the quality of kraft paper according to the customer's printing color requirements, what color to print and how many colors to print.

2. Adjustment of printing color

Kraft paper color is generally dark brown, printing color and bleached paper printing effect is very large, all the best choice of bright color, the effect of eye-catching color. Now some manufacturers also use UV ink, referring to ink chromatography and printing effects on different papers. Finally determine the printing color.

3. Adjustment of printing system

Adjust the suction volume of the nozzle before printing of thick kraft paper, and adjust the electrical devices such as double sheet control, skew control and punching control properly to prevent multiple sheets of kraft paper from rolling over the machine. In addition, the paper dispensing nozzle and the paper feeding nozzle should use a rubber ring with a larger diameter and thickness.

4. post-press processing

Because of the special structure of kraft paper, fiber characteristics are good. It is required that the processing equipment such as die-cutting knives and drilling is good, so as to ensure the high quality of the final product.

The above is the analysis of the matters that need to be paid attention to when the Star packaging is printed in the kraft paper bag, and the existing problems are found to be prevented, which can draw on advantages and avoid disadvantages and avoid occurrence.

Regarding the above questions, if you still have questions, please consult our Star packaging, we will reply to you in the first time.