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 Mix the ink in the ink fountain frequently, and pay attention to adding the 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, it is easy to make ink & n
Bsp; The gap between the bucket steel and the transfer iron roller becomes smaller, resulting in a reduction in the output of the ink and lightening of the printed ink. In order to avoid this situation, we must also pay attention to adding ink.

2. Scientifically and reasonably adjust the inking device (1) The adjustment of the local ink color in the horizontal position of the printed material. For example, the position of a certain section of the horizontal layout is mainly composed of characters, netting, and lines. The amount of ink suction is relatively small, and the corresponding ink fountain steel can be used. Adjust the adjustment screw inwards to reduce the amount of ink that is being dispensed in this area. 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) Adjusting the dark ink of the full-page ink The different inks in the ink fountain are to increase or decrease the conveying volume in an all-round manner. There are two adjustment methods: First, the gap between the ink steel sheet and the ink transfer (ink supply) iron roller is adjusted; The second is achieved by adjusting the size of the rotating arc of the transfer roller. 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.