The key factors in printing are some factor materials, including printed paper, printed lift-up flaps book, the lift-up flaps book in printing is a uniform mixture of colored body (such as pigment, fuel, etc.) bonding material, filling (filling) material, additive material and other substances; Can be printed and dried on the printed body; It is a slurry adhesive with color and certain fluidity. The printing process is actually the transfer and transfer process of the lift-up flaps book. How can I make the lift-up flaps book transfer correctly as required by the production process? So what are the factors that affect the delivery of lift-up flaps books?

1. Transfer from ink hopper to ink hopper roller

The lift-up flaps book in the ink fountain is always in good contact with the ink fountain roller, so that the lift-up flaps book is evenly transmitted from the ink fountain. This mainly depends on the rheological properties of the lift-up flaps book; Thixotropy can not be too large, the yield value can not be too high, the viscosity can not be too small, the filament can not be too short, and the rheology is better. For example, the lift-up flaps book in the ink hopper has high yield value and small viscosity, and its inking property is poor because it lacks the adhesion ability required for the ink hopper roller.

Therefore, it is necessary to often pour the ink to ensure good contact between the lift-up flaps book and the ink roller, and the print will be deep before and light after the gradual discontact between the lift-up flaps book and the ink roller. In addition, pay attention to the reserves of the lift-up flaps book in the network printing design in the ink hopper, and keep it within a certain range, and strive to make the ink uniform.

2, from the printing plate to the rubber blanket conversion

Because offset printing is indirect printing, the lift-up flaps book of the plate graphic part must be transferred to the substrate surface through the blanket, so the blanket surface is required to have good oil wet, hydrophobic performance, reasonable and uniform pressure between the blanket and the plate, when the plate graphic part is transferred to the blanket, Printing plate graphic part also save a part of the lift-up flaps book, in order to play a protective role is not underestimated, but also indispensable.

3, the transfer of rubber cloth to substrate

When the printing ink layer is transferred from the blanket to the print, the pressure between the blanket and the substrate should be uniform. The ink collection performance of the substrate itself should also be good, and there should be enough strength, the surface should be smooth, and the thickness should be uniform in order to print a good product.

The process of printing is also the process of transmission or transfer of the lift-up flaps book according to people's intentions. lift-up flaps book transmission refers to the transfer of the lift-up flaps book from the ink hopper to the ink roller. The entire journey from the inking roller to the plate through the blanket to the surface of the paper is the basic process of printing. In the process of transmission, the lift-up flaps book is affected by various factors such as printing machinery, plate, lift-up flaps book and paper. Therefore, how to control the lift-up flaps book transmission and correctly grasp these variable factors is also very important to improve the printing quality.

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