Ink knowledge analysis: How to avoid ink smudge in printing?

Ink smudging is one of the common problems in the printing process, it refers to the ink in the printing process beyond the design area, forming a blurred boundary on the printed matter. This will not only affect the quality of the print, but also reduce the accuracy and clarity of the print. Therefore, avoiding ink smudge is an important skill that every printing practitioner needs to master.

To avoid ink fainting, you first need to understand the causes of ink fainting. Ink smudging is generally caused by the following factors:

1. The viscosity of the ink is too high: the viscosity of the ink is very important for the control of ink fainting. Inks with too high viscosity are prone to wetting problems during the printing process, resulting in ink exceeding the design area. To avoid this problem, you can control the viscosity of the ink when making the ink to ensure that it can be evenly distributed on the page during the printing process.

2. Uneven surface tension of the plate: uneven surface tension of the plate is also one of the reasons for ink smudge. When the surface tension of the plate is uneven, the ink will form an uneven film on the plate and cannot be evenly distributed on the print. In order to avoid this problem, the plate can be correctly treated and coated to make its surface tension uniform.

3. Printing speed is too fast or pressure is too large: in the printing process, if the speed is too fast or the pressure is too large, it will lead to the ink cannot be evenly covered on the page, resulting in the formation of ink halo. Therefore, in the printing process, it is necessary to control the printing speed and pressure to ensure that the ink can be evenly covered on the page.

4. The selection of inappropriate ink: the choice of ink will also have a certain impact on ink smudge. Different types of inks have different characteristics, and the selection of inappropriate inks may lead to ink fainting. Therefore, when selecting ink, it is necessary to consider the characteristics and needs of the printing material, and choose the appropriate ink.

5. Improper treatment of the printing surface: the treatment of the printing surface will also affect the distribution of ink. If the surface of the printed material is not properly treated, such as impurities such as oil or dust, it will affect the adhesion and distribution of the ink, resulting in ink smudge. Therefore, the surface of the printed matter needs to be fully cleaned and treated before printing.

In order to avoid ink smudging, the following measures can be taken:

1. Control the viscosity of the ink: When making ink, the viscosity of the ink can be adjusted according to actual needs to ensure that it can be evenly distributed on the page during the printing process. It can be achieved by controlling the formula of the ink and adding the right amount of solvent.

2. Ensure that the surface tension of the plate is uniform: the surface tension of the plate is very important for the distribution of ink, so ensure that the surface tension is uniform when making the plate. This can be achieved with the right treatment and coating.

3.Control the printing speed and pressure: in the printing process, it is necessary to control the printing speed and pressure to ensure that the ink can be evenly covered on the page. The appropriate printing speed and pressure can be determined according to the characteristics and requirements of the printing material.

4. Choose the right ink: Consider the characteristics and needs of the printing material when selecting the ink, and choose the right ink. Different types of inks have different characteristics, choosing the right ink can reduce the occurrence of ink smudge.

5. Clean and treat the surface of the printed material: before printing, the surface of the printed material should be fully cleaned and treated to ensure that it is free of impurities such as oil and dust. This can improve the adhesion and distribution of the ink and reduce the occurrence of ink smudging.

To sum up, to avoid ink smudge, it is necessary to control the viscosity of the ink, ensure that the surface tension of the plate is uniform, control the printing speed and pressure, select the appropriate ink, and clean and treat the printing surface. These measures can help printing practitioners improve the quality and accuracy of printed matter, improve work efficiency and customer satisfaction.