Introduction to ink balance

The basic printing principle in printing is to use the two laws of oil-water incompatibility and selective plate adsorption to keep the ink and water in balance on the printing plate to realize the transfer of dots, and to achieve a clear image and full color of the printed matter. Effect.

The ink and water on the printing plate must be present and balanced at the same time. The purpose is to maintain the maximum amount of ink loaded in the graphic printing area, so that the ink is bright, saturated, and the dots are clear and clean, while keeping the non-printing area highly clean and tidy. The balance between water supply and ink supply is called ink-water balance.

The ink balance is the basis for lithography. In the offset printing process, the balance of ink and ink is just right, and there is a very close relationship with the normal transfer of imprinting, the depth of ink, the accuracy of overprinting, and the dryness of the printed matter. Whether it is possible to correctly control and control the ink-and-wash balance is the key to ensuring the quality of printed matter.

Ink and water are not absolutely incompatible. In the actual printing process, the ink and water are squeezed between the rollers and the ink rollers and fuse together to emulsify the ink. There are two types of ink emulsification: when the water is large in ink, the formation of "oil in water"; when the water is small, the formation of "oil in water" ... ...

Reprinted from: 21st Century Fine Chemicals Network