1. Adjust the printing pressure. In the process of printing and packaging, every two adjacent rollers of the three rollers of printing plate, rubber and embossing contact each other and are pressed to the transfer position. In order to obtain normal ink transfer on the printing paper and truly reproduce the continuous tone characters, lines, images and halftone points in the image and text parts, in addition to the contact between the two roller surfaces, these marks must also be subjected to the necessary printing pressure.

The size of printing pressure and the precision of regulation will directly determine the size and depth of ink color in graphic transfer and printing dot reproduction. During self-adhesive printing, it is necessary to adjust the center distance between the embossing drum and the rubber roller. The center distance of the rubber roller can be widened by about 0.2 ~ 0.4 mm. If the paper becomes thinner from thickness, the thickness should be reduced and the thickness of the pad removed from the printing plate pad should be added to the rubber roller; If the paper changes from thin to thick in the printing process, subtract a certain thickness from the blanket cylinder liner, and add the corresponding thickness to the liner of the plate cylinder.

Press and compress the printing plate to prevent the color box from sliding relatively in the printing process. In production practice, the ideal printing pressure is generally controlled at about 0.15-0.25mm. It must be emphasized that the ideal printing pressure is to make the printing of the graphic part of the printing plate firm enough on the paper, the dot is clear and complete, and the use pressure is small.

2. Pay attention to the adjustment of the paper feeding part when printing self-adhesive labels. Adjust the air volume of the suction nozzle and air blowing nozzle of the paper feeding part accordingly.

3. The paper separating suction nozzle and paper feeding suction nozzle shall be replaced with rubber rings with large diameter and thickness to realize smooth paper feeding and no swing of paper feeding roller.

4. The self-adhesive is the thickness of two layers of coated paper. It is necessary to pay attention to the paper thickness, increase the gap between the two controllers, and increase the distance between the paper tongue of the side gauge and the front gauge and the feeding board.

5. The distance between the transfer tooth pad and the surface of the embossing cylinder and between the transfer tooth pad and the paperboard should be increased, and the distance should be kept at about 0.3mm plus the thickness of the paper.