The production cost of gravure is high and the production cycle is long. If it is not used or stored, such as bumps, corrosion, oxidation, etc., the printing plate can not be used, which will inevitably affect the quality of the printed product and the delivery time of the product. Therefore, in the daily work, it is very important to use and save the intaglio. I hereby talk about my own opinion.
1. Before printing, firstly, compare the gravure test proof provided by the plate-making factory with the standard proof provided by the customer, and check whether the graphic content of the gravure plate cylinder is consistent with the printing effect. Clean the rust-preventive oil on the platen before the machine, and then carefully check the layout for bumps and sand-leakage to prevent printing plate waste due to accidental bruising.
2. When printing, install the doctor blade according to the normal printing speed. Because the squeegee holder can move back and forth to perform ink stringing, the squeegee blades that are cut generally have a length of 10 to 20 mm longer than the platen roller so that the ink can be scraped and the excess ink on both sides of the platen roller can be prevented from being printed on the substrate. The distance between the squeegee blade and the support blade is adjusted to 4-6 mm, and the support blade is preferably 10 mm from the blade holder. The blade pressure is preferably 2.5-4.0 kg.
3, in the printing process, if the light network color (ie highlight part of the ink) is difficult to transfer, you can appropriately reduce the angle between the squeegee and the regravure, and reduce the printing viscosity of the ink, shorten the platen roller and the imprinting roller The distance between the point of contact and the contact between the plate cylinder and the doctor blade.
4, the version of the drum should be kept indoors, the establishment of a separate copy house, to keep the room dry, ventilated, to maintain room temperature, humidity should be below 65%, not close to the version of drum acid, alkali and other corrosive materials to prevent the chrome layer was corrosion.
5. After the printing is completed, wipe the ink on the layout, sides of the plate, and the plug of the printing plate thoroughly with solvent to prevent the ink from drying and plugging the cells, and the failure of the next printing to block printing will not occur. If the ink on the shaft head is dry, it is easy to bring a lot of inconvenience to the printing process. In the printing process, the ink and ink sticks are deposited in the ink tank, and after the ink pump is cycled, they are finally caught between the squeegee and the printing plate. This can also cause printing failures such as “knife lineâ€. Injury gravure.
6. Due to the low production price of hollow concave plate cylinders, many printing manufacturers use hollow cylinders, but the hollow plate rollers have a low overlay accuracy and the upper and lower plates take time and effort. When disassembling the hollow version of drum plate shaft, special wrenches must be used to gently unload. Never use a blunt instrument such as a hammer or copper rod to strike the shaft head to prevent the positioning bolt near the shaft head from being deformed or dislocated by the blunt instrument. In addition, in the hollow version of the roller or change the shaft, must be evenly coated with a layer of butter in the sealing sleeve or plastic pad, to prevent the ink soaked into the inside of the plate for a long time, resulting in the internal corrosion of the plate cylinder.
7. In the process of transporting the platen cylinder, the operator is best to wear gloves. After the transportation is completed, the dirt on the surface of the printing plate should be wiped off immediately. After the surface of the plate is dry, apply a rust preventive oil (such as engine oil or kerosene) to preserve it.
8, in the change or transfer, wear good work clothes, jacket pockets are not allowed to put tools (such as pens, printing sandpaper or toothpick, etc.), the operation should not wear a watch, always check the clothes button, zipper, to prevent it Image of a roller that has fallen off, cracked and scratched.
1. Before printing, firstly, compare the gravure test proof provided by the plate-making factory with the standard proof provided by the customer, and check whether the graphic content of the gravure plate cylinder is consistent with the printing effect. Clean the rust-preventive oil on the platen before the machine, and then carefully check the layout for bumps and sand-leakage to prevent printing plate waste due to accidental bruising.
2. When printing, install the doctor blade according to the normal printing speed. Because the squeegee holder can move back and forth to perform ink stringing, the squeegee blades that are cut generally have a length of 10 to 20 mm longer than the platen roller so that the ink can be scraped and the excess ink on both sides of the platen roller can be prevented from being printed on the substrate. The distance between the squeegee blade and the support blade is adjusted to 4-6 mm, and the support blade is preferably 10 mm from the blade holder. The blade pressure is preferably 2.5-4.0 kg.
3, in the printing process, if the light network color (ie highlight part of the ink) is difficult to transfer, you can appropriately reduce the angle between the squeegee and the regravure, and reduce the printing viscosity of the ink, shorten the platen roller and the imprinting roller The distance between the point of contact and the contact between the plate cylinder and the doctor blade.
4, the version of the drum should be kept indoors, the establishment of a separate copy house, to keep the room dry, ventilated, to maintain room temperature, humidity should be below 65%, not close to the version of drum acid, alkali and other corrosive materials to prevent the chrome layer was corrosion.
5. After the printing is completed, wipe the ink on the layout, sides of the plate, and the plug of the printing plate thoroughly with solvent to prevent the ink from drying and plugging the cells, and the failure of the next printing to block printing will not occur. If the ink on the shaft head is dry, it is easy to bring a lot of inconvenience to the printing process. In the printing process, the ink and ink sticks are deposited in the ink tank, and after the ink pump is cycled, they are finally caught between the squeegee and the printing plate. This can also cause printing failures such as “knife lineâ€. Injury gravure.
6. Due to the low production price of hollow concave plate cylinders, many printing manufacturers use hollow cylinders, but the hollow plate rollers have a low overlay accuracy and the upper and lower plates take time and effort. When disassembling the hollow version of drum plate shaft, special wrenches must be used to gently unload. Never use a blunt instrument such as a hammer or copper rod to strike the shaft head to prevent the positioning bolt near the shaft head from being deformed or dislocated by the blunt instrument. In addition, in the hollow version of the roller or change the shaft, must be evenly coated with a layer of butter in the sealing sleeve or plastic pad, to prevent the ink soaked into the inside of the plate for a long time, resulting in the internal corrosion of the plate cylinder.
7. In the process of transporting the platen cylinder, the operator is best to wear gloves. After the transportation is completed, the dirt on the surface of the printing plate should be wiped off immediately. After the surface of the plate is dry, apply a rust preventive oil (such as engine oil or kerosene) to preserve it.
8, in the change or transfer, wear good work clothes, jacket pockets are not allowed to put tools (such as pens, printing sandpaper or toothpick, etc.), the operation should not wear a watch, always check the clothes button, zipper, to prevent it Image of a roller that has fallen off, cracked and scratched.