Correctly adjust the inking device for better ink quality

In the letterpress printing process, the following factors are closely related to the quality of the printed ink. Correctly understanding and understanding the relationship between these factors and ink color is of great significance for accurately controlling the quality of printed ink.

Correctly adjust the inking device

　　 1. Mix the ink in the ink fountain frequently, and pay attention to adding ink regularly

In the printing process, the ink in the ink fountain should be frequently used to prevent precipitation and suspension. In addition, due to the reduction of the amount of ink in the ink fountain, the gap between the ink fountain steel sheet and the transfer iron roller is easily reduced, resulting in a reduction in the amount of ink output and lightening of the printed ink. In order to avoid this situation, we must also pay attention to adding ink.

2. Scientifically and reasonably adjusting inking devices

　　 (1) Adjustment of the local ink color in the horizontal position of printed materials

For example, if the position of a certain section of the horizontal layout is text, texture, or line, the amount of ink sucked is relatively small, and the corresponding ink adjusting screw of the ink fountain can be screwed in to appropriately reduce the amount of ink transferred to the part. If the position of a certain section of the horizontal layout is mainly on the ground or on the plate, the amount of ink should be increased accordingly, so that the full-page ink color remains uniform.

(2) Full-page ink adjustment

Different inks in ink fountains are required to increase or decrease the total transport volume. There are two adjustment methods: one is to adjust the gap between the ink conveyer steel sheet and the transfer ink (supply ink) iron roller, and the other is to adjust the ink transfer iron roller. Rotate the arc size to achieve. In the case of a thin ink, it is not appropriate to adjust the gap between the steel sheet and the iron roll so as to prevent ink leakage due to ink leakage. When adjusting the amount of ink, the rotational arc of the transfer roller should be controlled within 1/2 of its adjustment range, so that the amount of ink can be flexibly adjusted when the ink density changes during the printing process.