Variable QR code is a new product traceability system, which means that each printed QR code has a different numerical number. By scanning the variable QR code, we can know the manufacturer, model, contact information, and other information of the product. Variable QR codes are currently widely used in pharmaceutical packaging boxes, veterinary packaging boxes, food packaging boxes, and will also be widely used in more and more professions in the future.

The variable QR code is not produced at once when printing other content, but is a separate process added after the other content of the product is printed. Before printing the variable QR code, we design a white box in the direction where the QR code is to be printed, with the intention of avoiding the nozzle from scratching the printing surface. The size of the box is a 16mm or 21mm square rectangular box, as there may be a 1-2mm deviation in the nozzle of the printing machine when printing the variable QR code. After printing the variable QR code, it is necessary to cover the printing surface with film to avoid the QR code from being worn off during transportation or subsequent processes.

Therefore, when creating variable QR codes, we need to pay attention to the following key points:

1、 Preparatory code segment (different numerical codes)

2、 White background and black text (QR code with white background and black QR code)

3、 The size of the QR code with a white background should be greater than

4、 Print first, spray code later, and then apply film