Solution for gravure printing on paper

Date: Sep 29 2024 From: Star Color

Gravure printing is a printing technology with a long history, which occupies an important position in packaging printing, label printing and other fields due to its high definition, rich color and distinct layers. When the intaglio factor is printed on paper, the performance of intaglio printing can be well utilized. As paper is an absorbent material, it does not require additional processing and has good adsorption and color reproduction ability.

Hardware and device optimization

1. Application of automatic overprinting device
The automatic printing device monitors and adjusts the position of the printing plate cylinder in real-time through high-precision sensors and control systems, ensuring precise printing between colors. This can not only eliminate printing errors and improve printing accuracy, but also reduce manual intervention and improve production efficiency.

2. Use of electrostatic ink suction device
The electrostatic ink suction device utilizes the principle of static electricity to better adhere ink to paper under the action of electric field force, thereby improving the transfer rate and printing quality of ink. At the same time, the device can effectively reduce ink overflow and keep the printing surface clean.

3. Other key equipment adjustments
The roundness correction of the printing plate cylinder is crucial for ensuring printing quality. By using professional calibration equipment and methods, the roundness of the printing plate cylinder can be ensured to meet the requirements, thereby avoiding problems such as uneven ink density during the printing process. The angle and pressure of the ink scraper also need to be adjusted according to the characteristics of the ink and printing speed to ensure the best ink scraping effect.
Solution for gravure printing on paper

Ink and solvent management

1. Ink selection and blending
The performance of ink directly affects the printing quality. When selecting ink, performance indicators such as viscosity, drying speed, and adhesion should be fully considered. At the same time, according to printing requirements, appropriate amounts of anti coagulation and anti precipitation additives can be added to improve the stability and printing effect of the ink. For special effects such as fluorescent ink, attention should also be paid to their usage methods and precautions.

2. Solvent selection and use
The drying speed of solvents has a significant impact on the printing effect. When selecting solvents, comprehensive consideration should be given to the drying performance and printing speed of the ink. Fast drying solvents can accelerate the drying speed of ink, but they can easily cause problems such as plate blockage; Slow drying solvents are the opposite.

Printing process control

1. Printing speed control
Printing speed is one of the important factors affecting printing quality. During the printing process, the printing speed should be reasonably controlled based on factors such as the drying performance of the ink and the ink absorption performance of the paper. Excessive printing speed may cause ink to be covered by the next color before it dries completely, resulting in issues such as anti sticking; However, a slow printing speed may reduce production efficiency.

2. Printing pressure adjustment
The magnitude of printing pressure directly affects the clarity of the imprint and the transfer rate of ink. When adjusting printing pressure, comprehensive consideration should be given to factors such as paper thickness and ink viscosity. Appropriately increasing the printing pressure can improve the clarity of the imprint and the transfer rate of ink, but excessive pressure may cause paper deformation or damage to the printing plate.

3. Ink viscosity and flowability management
The viscosity and fluidity of ink have a significant impact on the printing effect. During the printing process, viscosity controllers and other equipment should be used to monitor and adjust the viscosity of the ink in real time to ensure that it is in the optimal state. At the same time, attention should be paid to the fluidity of ink to avoid phenomena such as ink accumulation or poor flow.

Environment and humidity control

1. Workshop humidity control
The humidity in the workshop has a significant impact on the dryness and flowability of ink. During the printing process, the humidity in the workshop should be kept relatively stable to avoid problems caused by excessive or insufficient humidity. Generally speaking, the humidity in the workshop should be controlled within a certain range (such as 50% -70%) to ensure the normal drying and flow of ink.

2. Composite film protection
For printed materials that require lamination, excessive humidity may also cause problems such as wrinkling of the lamination film. Therefore, when conducting composite operations in environments with high humidity, corresponding protective measures such as adding dehumidification equipment should be taken to ensure the quality of the composite.

Although the application of gravure printing on paper faces many challenges, measures such as optimizing hardware equipment, scientifically managing ink and solvents, strictly controlling the printing process, and reasonably controlling the environment and humidity can effectively solve these problems and improve printing quality. In the future, with the continuous advancement of technology and the expansion of application fields, gravure printing technology is expected to play an important role in more fields and promote the sustainable development of the printing industry.