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The rule of inking on high-speed gravure printing presses can be understood in four sentences
Time: 2017-12-14 Source: Cutting Edge of Packaging Read: 10204 times
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Wenzhou Junchuan Machinery Equipment Co., Ltd.

The inking law of gravure printing has one decisive factor and three related factors. The following are divided into four aspects.

1. The depth and lightness of the characters and patterns produced by the plate cylinder determine the amount of ink on the printed matter. That is, the characters and patterns of the printing plate cylinder are made deep, and the amount of ink on the printed matter is large. Otherwise, the characters and patterns are made light, and the amount of ink on the printed matter is small.

2. The hardness of the material of the impression cylinder and the pressure of the impression cylinder affect the amount of ink on the print. The material of the impression cylinder is soft, and the amount of ink applied to the print is large; otherwise, the material of the impression cylinder is hard, and the amount of ink on the print is small. The pressure of the impression cylinder is large, and the amount of ink on the printed matter is large. On the contrary, the pressure of the impression cylinder is small, and the amount of ink on the printed matter is small.

3. The viscosity of the ink affects the amount of ink on the print. Ink viscosity is large, the amount of ink on the print is large, and conversely, the viscosity is small, and the amount of ink on the print is small.

4. The printing speed is fast or slow, which affects the amount of ink on the print. The printing speed is fast, the amount of ink on the print is large, and the printing speed is slow, and the amount of ink on the print is relatively small.

The plate cylinder is the determining factor in determining the amount of ink on the print. The viscosity of the printing ink is the most important factor affecting the amount of ink on the print, and it is also an important factor affecting the printing speed. The viscosity of the ink is known by measurement, and the thickness of the ink is obtained by perception. The two are closely related. Although the viscosity is not equal to the thick and thin, when the paint cup and the Zahn cup are actually used to measure, the viscosity and the thin result are inseparable.

In order to facilitate understanding, the following discussion uses thick and thin instead of viscosity, that is, the viscosity is called thick, and the viscosity is called thin. Then, when the characters and patterns made by the printing plate cylinder are deep, the ink needs to be thick; otherwise, the ink thinning will cause ghosting, which is the halo phenomenon. Conversely, the characters and patterns made by the plate cylinder are light, and the ink should be diluted, otherwise the plate will be dry, that is, blocked. The printing speed is fast, and the ink needs to be diluted, otherwise the phenomenon of ink scraping will not be clean. The printing speed is slow, and the ink must be thick, otherwise the phenomenon of water streaks will appear on the printed matter. The phenomenon of running ink, cutting line, eating ink, fake drying and so on all have a lot to do with the ink being too thick.

Summing up the above, we have four tips:

The dark ink of the printing plate pattern should be thick;

The printing plate pattern light ink needs to be dilute;

Fast printing speed, ink needs to be diluted;

The printing speed is slow. The ink needs to be thick.


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