Tag coated paper in the printing process of the common problems

The common problems of tag coated paper in the printing process mainly include the following aspects:

1. Print quality problems caused by poor ink absorption ability

Problem description: Due to the smooth surface of the coated paper, the ink absorption ability is poor, which may lead to uneven ink layer in the printing process, and even decolorization, powder and other problems.

The solution:

Deep ink printing: the appropriate deepening of the ink phase, so that the ink layer thin, both to meet the requirements of printing color, but also to reduce the opportunity to overprint, to prevent overlapping printing.

Use toning oil: When printing the first color, you can use No. 19 resin oil as a toning oil to improve the adhesion and printing effect of the ink.

Adjust the ink quality: ensure that the viscosity and fluidity of the ink are suitable for the characteristics of the coated paper, and use auxiliary materials to adjust the ink quality if necessary.

2. Paper curvature and flatness problems

Problem description: The coated paper is thick, and the new one dozen coated paper will have a certain degree of bending. If the paper is too bent, the edge will scratch the nozzle of the printer, resulting in poor print quality.

The solution:

Keep the paper flat: Keep the paper flat before printing, avoid excessive stacking, in case the paper bends and affects the print quality.

Control of ambient temperature and humidity: coated paper is easy to curl and deform during its production and storage, and is greatly affected by temperature and humidity. Therefore, maintaining the balance of temperature and humidity of the environment helps to reduce paper deformation.

3. Poor paper adhesion and decolorization problems

Problem description: Coated paper surface coating, poor adhesion, printed on the ink layer is sometimes easy to decolorize due to powder.

The solution:

Use heat and light resistant inks: When deploying the base color ink, try to choose heat and light resistant inks to prevent the base color from first printing easy friction damage to the ink layer.

Add anti-stick agent: For a large amount of ink or multi-color overprinting, easy to produce sticky problems, you can add anti-stick agent in the ink, but pay attention to the amount of not more than 4%, so as not to emulsify the ink, printing ink layer flowers and ink layer gloss decline.

4. Improper debugging of printing pressure and speed

Problem description: Heavy printing pressure is easy to produce bad powder, and easy to cause dot imprinting is not clear, and increase plate wear; On the contrary, it is easy to cause the dot imprinting is not strong, and blindly increase the ink layer to make up for the layout caused by insufficient pressure.

The solution:

Strictly control pad technology and printing pressure debugging: to ensure that the printing ink layer is uniform and bright, and the printing pressure of coated paper should be uniform and appropriate.

Adjust the print speed and resolution: Since coated paper is thicker than normal paper, the print speed needs to be slowed down appropriately to ensure that the print head can properly pass through the paper. At the same time, avoid setting too high a print resolution to avoid blocking the print head or jamming the copper paper.

5. Problems in the cutting process

Problem description: When cutting the finished product, if the cutting pressure is too large, it will produce the phenomenon of "slip paper" and press the product out of marks; If the pressure is too small, it will produce the phenomenon of "displacement".

The solution:

Control cutting pressure: After a long time of cutting comparison, find the suitable cutting pressure for coated paper to ensure that the cutting product is consistent up and down, and there will be no skew phenomenon.

6. Other questions

Improper setting of paper type and thickness: If the paper type and thickness are not set correctly, the printer may not handle the coated paper correctly, affecting the printing effect.

Insufficient printer cleaning: Coated paper clogs the printer more easily than regular paper, so the printer needs to be cleaned regularly to ensure that it is always running smoothly.

In summary, for the common problems that may occur in the printing process of the tag coated paper, corresponding measures need to be taken to ensure the printing effect and the normal operation of the printer.