Merchants often encounter such a problem in paper bag printing, that is, when printing paper bags, printing errors will occur, which will affect the printing quality of the products. Then let's take a look at it with you. What factors will affect the printing quality of paper bag printing?
1, Related to the thickness of the ink layer
The thickness of the ink layer of the print has a certain relationship with the amount of embossing solution used on the surface of the board. There are two ways to increase the thickness of the printing ink layer: one is to increase the amount of ink without changing the amount of embossing liquid; the other is to reduce the amount of embossing liquid without changing the amount of ink. Both methods have the same principle. They all increase the ink content under the condition of "oil-in-water" and reduce the content of small droplets of ink on the board, thereby increasing the thickness of the ink.
2, Related to the quality of the blanket
Air cushion rubber cloth and ordinary rubber cloth are commonly used in production. When in contact with the printing plate, some of the wetting solution adhering to the surface of the printing plate is transferred to the surface of the blanket due to the adsorption of the surface of the rubber cloth. If the surface loses part of the embossing solution, it needs to be replenished in time, and the amount of replenishment will reach equilibrium and imbalance.
3. Related to the graphic area of the printing plate
There is a direct relationship between the amount of embossing solution required on the surface of the plate and the graphical area. If the picture and text area are large, the relative blank area will be small; if the picture and text area are small, the relative blank area will be large. In general, the amount of embossing solution required for a large printing area is small, and the amount of embossing solution is large.