1. Printing plate problem. When printing, insufficient exposure or insufficient development, the light decomposition of the blank part is not complete or the sensitive layer of the blank part is not washed away. There are dirty points on the thick version, there are dirty points on the glass of the printing machine, the front page of the baking version is thoroughly cleaned or the protective agent is not evenly coated, and the unequal glue will also cause greasy. Greasy serious, can only be re - sunburn. If the oil is light, or only a few parts, you can reduce the fat of the plate, and put some gum Arabic in the water solution. Heat transfer ink
2. The pressure between the printing plate drum and the rubber drum is too large. The pressure between the printing plate roller and the rubber roller is too large, which will increase the friction force on the layout, and the layout wear and tear. If the distribution of lining is unreasonable, the slip between the rollers will increase, and the lining should be arranged reasonably: If a large amount of compression causes a large pressure, adjust the compression amount appropriately. The soft lining should be controlled at about 0.25mm, the neutral lining should be controlled at about 0.15mm, and the hard lining should be controlled at about 0.08mm. Sublimation heat transfer ink offset heat transfer ink
3. Inking roller and printing plate pressure is too large, the sliding friction will increase, will affect the printing plate printing resistance, dot expansion, will also form dirt and greasy. At the beginning of printing, only dirt is formed, and the blank foundation of the printing plate is not destroyed. If not adjusted in time, continued friction will make the blank part oil-friendly, forming greasy. The plug gauge can be used to adjust the pressure of the inking roller one by one, and the pressure on both sides of the inking roller should be consistent. Contact width can also be measured, monochrome lithography press from the roller to the roller and the plate contact width is generally 6mm, 5mm, 4mm, 4mm. Multi-color lithography presses are generally 4mm, 4mm, 3mm, 3mm. Heat transfer ink offset thermal sublimation ink
4. Aging of inking roller. The inking roller for a long time under pressure rolling and moistening liquid, ink contact, easy aging, elasticity becomes smaller, ink transfer effect becomes worse, the blank part of the printing plate from dirty to greasy. After each change of color, the remaining ink skin and ink stains on the surface of the inking roller must be washed. The pressure of the inking roller should be appropriate. If the aging layer is found, try to erase it. If it is serious, remove the inking roller and put it on the grinder to erase the surface hardened layer.
Henan Zhongliqi sublimation ink factory specializing in the production of thermal sublimation ink, thermal transfer ink, sublimation thermal transfer ink, sublimation ink manufacturers. Including: offset printing sublimation ink, screen printing sublimation ink, gravure sublimation ink, sublimation thermal transfer ink. Looking forward to your call!
Contact Person:
Miss Li:13298345127
