How to prevent ink smudging when printing circular colored copperplate labels?

Ink smudging is a special concern when printing circular colored copperplate labels. To prevent ink smudging, the following measures can be taken:

1、 Adjust printing process parameters

Increase printing pressure:

Appropriate printing pressure can ensure that ink stays in the desired area for a longer period of time, reducing the possibility of ink spreading to areas that should not be present.

Adjust printing speed:

Reducing printing speed helps ink adhere better to paper and reduces the occurrence of smudging.

Optimize ink formula:

Adjust the proportion of various pigments in the ink formula as needed to achieve the desired color and viscosity, thereby reducing smudging.

2、 Choose and use appropriate ink

Choose high-quality ink:

Using high-quality ink with reasonable additives can reduce the risk of ink smudging.

Avoid using expired or poor quality ink:

Expired or poor quality ink may lead to inaccurate ink color and poor fluidity, thereby increasing the possibility of smudging.

3、 Maintain printing equipment and plates

Regular cleaning of printing plates:

Use professional cleaning agents to clean the printing plate, ensuring that the surface of the plate is clean and the ink can be distributed normally, reducing smudging caused by residue on the surface of the plate.

Replace worn printing plates:

If the printing plate is used for too long and the surface wears out, it will affect the distribution and color of the ink, leading to smudging. Therefore, it is necessary to regularly replace worn printing plates.

Cleaning ink tank:

Cleaning the ink tank can prevent ink from accumulating in the tank, leading to clogging and smudging.

4、 Control the temperature and humidity of the printing environment

Maintain appropriate environmental temperature and humidity:

The temperature and humidity of the printing environment have a significant impact on the fluidity of ink. Excessive temperature or humidity can increase the fluidity of ink, making it prone to smudging. Therefore, it is necessary to maintain appropriate environmental temperature and humidity.

5、 Adopting special printing technology

Using colored screen printing:

When making plates, try to use colored wire mesh (such as red, yellow, orange, etc.) instead of white wire mesh. Colored wire mesh can absorb the light from the exposure light source, reduce reflection and scattering, and help prevent ghosting.

Pre coated anti ghosting solution:

Before applying photosensitive adhesive, a layer of anti ghosting liquid can be applied. This solution is made by blending ethanol, cresol, and ethanol soluble red dye in a certain ratio, which helps prevent the occurrence of ghosting.

In summary, preventing ink smudging requires starting from multiple aspects, including adjusting printing process parameters, selecting and using appropriate ink, maintaining printing equipment and plates, controlling the temperature and humidity of the printing environment, and adopting special printing techniques. The comprehensive application of these measures will help improve printing quality and reduce the occurrence of ink smudging.