What are the problems that may occur when printing round colored copper label paper?

When printing round color copperplate label paper, the problems that may occur mainly include the following aspects:

1. Problems caused by paper characteristics

Poor ink absorption: The surface of coated paper is smooth, and the ink absorption ability is poor, which may cause the ink to be difficult to adhere to the paper evenly, affecting the printing effect. Therefore, in the printing process, it is necessary to use the appropriate ink formula and printing parameters, such as to achieve "deep ink thin printing", that is, to properly deepen the ink phase and control the ink layer thickness to meet the color requirements and reduce overprinting problems.

Crimp deformation: coated paper is prone to crimp deformation during production and storage, and is greatly affected by temperature and humidity. If the temperature and humidity of the printing environment are not balanced, it may lead to paper deformation, affecting the printing accuracy and overprinting accuracy.

Dedusting and dark shadow phenomenon: due to the coating of coated paper, the printing process may encounter dedusting and the appearance of dark shadow on the printed page. This is usually related to improper operation of the loading process or inappropriate ink consistency.

2. Printing process problems

Improper pressure adjustment: the printing pressure of coated paper should be uniform and appropriate, and the excessive pressure is easy to produce bad powder, and it is easy to cause the dot imprinting is not clear, and increase the 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.

Insufficient anti-sticking measures: the ink absorption of coated paper is weak, the back is relatively smooth, and the printing of a large amount of ink or multi-color overprinting is easy to produce sticky problems. If the anti-stick measures are not appropriate, it may lead to a decline in the quality of the printed matter.

Ink problems: the viscosity, fluidity, dryness and anti-viscosity of the ink directly affect the printing effect. If the ink formula or performance is not good, it may lead to problems such as uneven color, slow drying, sticky and dirty printing.

3. Cutting and post-processing problems

Cutting accuracy: Because the surface of coated paper is smooth and there may be a certain degree of bending, if the pressure is not properly controlled during cutting, it may lead to slip phenomenon or product pressure marks. Therefore, it is necessary to control the cutting pressure to ensure the cutting accuracy.

Stacking and storage: Excessive stacking or improper storage of printed coated paper labels may cause paper distortion or adhesion, affecting subsequent use. Therefore, it is necessary to take out the printed label in time and store it properly.

4. Equipment and operation problems

Device fault: The fault of the printer may cause problems such as paper jam and printing leakage during printing. Therefore, it is necessary to maintain and maintain the equipment regularly to ensure the normal operation of the equipment.

Improper operation: the operator's familiarity with the equipment and operation skills will also affect the printing effect. Therefore, it is necessary to train the operators to ensure that they can master the operation methods and skills of the equipment.

To sum up, when printing round color copperplate label paper, it is necessary to pay attention to the paper characteristics, printing process, cutting and post-processing, as well as equipment and operation, to ensure the quality and efficiency of the printed product.