How to achieve perfect printing of two-dimensional code
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A good two-dimensional code design is a prerequisite for the perfect printing of a two-dimensional code. In the design process, it is necessary to comprehensively consider the characteristics of the two-dimensional code and the printability.
01, size and resolution settings
The minimum area of the QR code is 19mm x 19mm, and it cannot be shaded or variegated. It is recommended that the resolution be set to 150 to 300dpi. Otherwise, the size of the QR code may be too small, too dense or insufficient resolution, which may cause printing. After the two-dimensional code can not be normally scanned. When the two-dimensional code is a profiled two-dimensional code, the corresponding two-dimensional code size requirement refers to a true two-dimensional code size.
02, color matching
The color matching has a great influence on the maximum reflectivity of the strip and the print contrast. The principle of maximizing contrast and meeting the requirements of standards are important principles to be mastered when designing and printing two-dimensional codes. Black bar white space is the best choice. As long as there is sufficient contrast between the bar and the blank, other colors can be used, but the bar cannot be yellow, orange, red, dark brown, or gold. Beautify the two-dimensional code foreground and background color too close will also lead to two-dimensional code can not be normally scanned. In actual production, it is necessary to carry out proofing in advance for difficult combinations to be grasped. After testing, there are no problems before high-volume production can be carried out.
03, the generation of two-dimensional code
The information contained in the two-dimensional code is too long, which will make the generated two-dimensional code pattern too complex and thus cannot be identified. If there is more information, it is recommended to use the live code function of the grass web to generate the two-dimensional code.
04. Leave a blank area
The blank area plays the role of the two-dimensional code recognition device in preparing for scanning, and must ensure that its size is sufficient. In the process of reading the actual two-dimensional code, in order to avoid the interference of surrounding colors, the width of the left and right blank areas of the two-dimensional code should generally be not less than 5mm.
Printing of two-dimensional code
Nowadays, the two-dimensional code printing method mainly uses inkjet printing. It is a computer direct printing technology, that is, the ink is ejected through a nozzle and is directly imaged on a substrate. The characteristics of inkjet printing determine that it can realize the variable data processing functions that are not available in traditional printing and can complete the printing of two-dimensional codes. Compared with electrostatic imaging digital printing technology and direct imaging technology of printing machines, ink jet Printing has its unique advantages in the comprehensive expression of speed, cost, and quality. If the two-dimensional code is not printed properly, there may be no visible flaws in the naked eye, but it cannot be completely recognized by the two-dimensional code. So, here we will mainly introduce the matters needing attention when using the inkjet printing technology to print two-dimensional codes.
01, adjust the paper moisture content
If the moisture content of the paper is not adjusted properly, there is a possibility that the variable QR code that has just been printed can be recognized by the two-dimensional code reading device, but after being left to dry, the image is distorted due to the spread of ink and the shrinkage of the paper. , thereby affecting the identification of two-dimensional code reading devices. Therefore, we must control the moisture content of the paper.