How to solve the color deviation problem of self-adhesive coated paper printing?

To solve the color deviation problem of self-adhesive coated paper printing, you can start from many aspects, the following are some specific solutions:

1. Material selection and inspection

Material inspection: Each batch of self-adhesive coated paper is inspected, including its smoothness, pH, absorption, dryness, scalability and surface bonding strength, etc., to ensure that the material properties meet the printing requirements. This can avoid color deviation caused by the material itself.

Ink matching: Select the ink that matches the self-adhesive coated paper to ensure that the color strength, gray scale, hue error, coloring force, transparency, viscosity, fineness and color stability of the ink meet the printing standards.

2. Printing equipment and process adjustment

Equipment maintenance: Regular maintenance and adjustment of printing equipment, including ink tank, water roller, ink roller, swing frame and other components cleaning and wear inspection. Ensure that the printing pressure is uniform and appropriate to avoid color deviation caused by equipment problems.

Process optimization:

Deep ink printing: For large-area field printing, the method of "deep ink printing" is used, that is, the ink color is properly darkened, and the ink layer thickness is controlled at the same time to obtain a uniform and full color effect.

Adjust the printing pressure: By adjusting the pad technology and printing pressure, to ensure that the layout ink layer can be evenly transferred to the substrate, to avoid the phenomenon of different ink layers.

Anti-stick measures: For the characteristics of coated paper ink absorption is weak and the back is smooth, appropriate anti-stick measures are taken, such as adding anti-stick agent to the ink to prevent color deviation caused by sticky problems.

3. Ink and color management

Ink quantitative analysis: Ink suppliers are required to conduct quantitative analysis of the ink used in standard sample printing, provide detailed and true index detection data, and compare with standard ink indicators to ensure stable ink quality.

Color correction: Use color measurement tools such as spectrophotometer to correct the color of the printed matter to ensure that the printed color is consistent with the customer's sample or design. For spot color printing, ink allocation should be carried out after confirming the color standard with the customer.

4. Environmental control

Temperature and humidity control: The printing shop should maintain appropriate temperature and humidity conditions to avoid the impact of temperature and humidity changes on ink transfer and drying speed, thereby reducing color deviation.

Air quality: Keep the air in the printing shop fresh and reduce the impact of impurities such as dust on printed matter.

5. Other precautions

Avoid frequent material changes: try to keep using the same batch or the same supplier of self-adhesive coated paper to reduce color deviations caused by differences between material batches.

Staff training: Strengthen the technical training of printing operators to improve their understanding and ability of printing process and color management.

In summary, to solve the color deviation problem of self-adhesive coated paper printing, it is necessary to adopt comprehensive policies from many aspects, such as material selection, printing equipment and process adjustment, ink and color management, environmental control and staff training. Only in this way can we ensure the consistency and stability of the printed color.