1.ink preparation

The method of judging the degree of thickening and thinning of the slitting machine: the degree of thickening is as follows: after the ink passes through the screen, the printing surface does not appear the screen mesh or drawing. The degree of thin to put on the screen, ink by its own weight can achieve through the mesh but not drop as the best. When the printing line is fine, the point should be diluted; conversely, the point should be concentrated.

2.screen selection

The quality of silk cloth to wire diameter uniform, mesh number accurate consistent, for quality stability. The general selection of mesh is 450~500 mesh. Fine line, ink fineness, poor absorption of the substrate, should choose a screen with high mesh number, conversely, should choose a screen with low mesh number. The position and size of the screen plate should be based on the structure and size of the substrate and the position of the substrate. If the design is not good, it will affect the quality of screen printing, or even screen printing. In addition, the image and text on the same printed object, it is best to use a screen printing. If divided into two to online printing, the process will reduce the qualified rate of screen printing.

3. Selection of scraper

The material of the scraper used by the slitting machine is polyurethane. Polyurethane rubber scraper has good wear resistance, solvent resistance and resilience. The hardness of 60~80 Shaw. Screen tension, good surface flatness substrate, should choose high hardness of the scraper. On the contrary, should choose low hardness. When printing on the substrate of curved surface, low-degree sphere or poor flatness (local protrusion), the width of the scraper should be narrow and not wide.

4. screen positioning

The jig materials used in the factory are metal, wood, plywood, PVC transparent sheet. Such as difficult positioning, substrate size and small, should choose metal production fixture.

5. screen printing process

The high scraping pressure of the sgrader means more ink, but the screen is easy to deform, so the scraping pressure should not be high. Scraping speed is often 60~200mm/s. Scraping printing speed, less ink, but not easy to block the net. Therefore, easy to block the network of ink, scraping speed should be faster. Scratch printing route for straight line, oblique line and curve three. Should be based on the substrate flatness and graphic distribution on the substrate to choose. When the printing line is long and the ink consumption is large, the ink scraping amount should be more than even a layer of ink scraping first, and then scraping printing.