What are the common quality issues with circular colored copperplate labels and how can they be solved?

The common quality issues and solutions for circular colored copper plate labels mainly include the following aspects:

1、 Color deviation

Problem description:

There are differences between the printing color of the label and the design draft or customer sample.

Solution:

Use a color management system (CMS) to ensure color consistency.

Regularly calibrate printing equipment and materials to ensure the accuracy and stability of the equipment.

Use color measurement tools such as spectrophotometers for color control and adjust printing parameters in a timely manner.

2、 Inaccurate overprinting

Problem description:

When printing in multiple colors, the misalignment between the color plates can cause the patterns to be misaligned.

Solution:

Ensure the accuracy of the overprint system of the printing machine, and regularly maintain and calibrate the equipment.

Adopting automated overlay adjustment technology to improve overlay accuracy.

Make samples and proofread before printing to ensure accurate color and correct overprinting.

3、 Uneven ink stain

Problem description:

During the printing process, ink is unevenly distributed, resulting in stripes or spots.

Solution:

Check and adjust the fluidity and viscosity of the ink to ensure that the ink is suitable for printing.

Keep the printing plate, rubber blanket, and ink roller clean, and regularly replace aging or damaged components.

Adjust the printing pressure to ensure even distribution of ink layer.

4、 Sticky and slow drying

Problem description:

After label printing, the ink may not dry completely or the surface may become dirty, affecting its appearance and usability.

Solution:

Choose appropriate ink and additives to ensure moderate ink drying speed.

Strengthen ventilation and heating measures to improve drying efficiency.

Use anti sticking agents or gloss oil to reduce ink fouling.

5、 Defying fans and shadows

Problem description:

The surface of the label may experience powdering, or the layout may display black shadows and spots.

Solution:

Check the plate installation process to ensure that the plate pad is evenly distributed and avoid excessive pressure causing powder peeling.

Adjust the viscosity of the ink to avoid the ink being too thick or sticky, which can cause powder to fall off the paper surface.

Use high-quality copperplate paper to reduce the possibility of paint peeling off.

6、 Unstable size

Problem description:

There is a difference in label size, which does not meet the product design requirements.

Solution:

Establish a standardized process for label production, including size setting, cutting accuracy requirements, etc.

Strengthen the dimension inspection process and establish standards and methods for dimension testing.

Use high-precision die-cutting equipment and cutting tools to ensure cutting accuracy.

In summary, common quality issues with circular colored copperplate labels need to be addressed from multiple perspectives. By strengthening color management, improving overlay accuracy, adjusting ink state, enhancing drying measures, optimizing plate loading process, and strengthening size inspection, the printing quality and stability of labels can be effectively improved.