During the printing process, the paper undergoes certain deformation due to printing pressure and peeling tension. After the paper with large plastic deformation leaves the embossing area, the deformation cannot be recovered, resulting in large overprinting errors.
Paper is a material with plastic deformation, and the plastic deformation characteristics of different papers are not the same.
Under the action of greater printing pressure, the width and the length of the trailing corners of the paper with large plastic deformation will slightly expand, resulting in inaccurate registration. Especially in the trailing part of the paper is more serious.
The greater the printing pressure, the more obvious the deformation of the paper.
Therefore, when printing the same batch of products, the pressure of each color Printing Distortion plate should be as consistent as possible, but sometimes the pressure should be adjusted according to the specific situation.
2. Effectively implement relevant national standards and regulatory documents
1. Strengthen system construction
2. Ensure the timeliness of national bar code standards and regulatory documents. National bar code standards.
3. To ensure the continuity and integrity of bar code quality records, printing companies should follow the four systems of bar code management,