The color crystal glass used in the two main markets of home decoration and public decoration is screen-printed. The basic production elements are: screen + ink + printing equipment, general screen and printing equipment can be selected on behalf of the system, and variable element control Focus on the ink: here are divided into two types: 1, printing ink; 2, spraying ink. The main operating technology elements are the following:
First, the printing ink (refers to the glass screen printing special ink SG series):
1: color, 12 spot colors + dot four colors + clear oil + color matching
2: Adhesion, more than four.
Test 1: 3M double-sided adhesive was peeled off after pressing, and no color marks were seen.
2: habitual nail scratches without break marks.
3: Application: On emulsified (or roughfaced) glass, printed directly after 783 dilution; directly printed after back-coating after flat (or smooth) glass printing; independent printing on flat (or glossy) glass 3-5% curing agent can be added when back coating.
4: Drying: dry at room temperature for 20-30 minutes, dry 8-10 hours (self-drying), such as the mandatory quick-drying curing should be 80-100 ° after the implementation of a constant temperature for 5-10 minutes.
Second, printing control (attention during operation):
1 Net distance: When printing, the screen should not cling to the glass (substrate) and should be kept 1-2CM.
2 Back to ink: After scraping, it is necessary to scrape back the ink and evenly cover the ink on the screen and avoid dry printing.
3 Toning: Before printing, adjust the hue and auxiliaries of the ink and let it stand for about 1-2 hours after defoaming .
4 Test: Pre-provisioning a small sample, will be adjusted after a small area of ​​ink test after the test, the expected requirements of qualified open, to avoid uncertainties failure.
5 screen: It is recommended to use 180 mesh-200 mesh DPP single screen cloth with tension of 20±2 newtons, oily photosensitive adhesive or water-solubility-compatible screen printing screen, which has higher printing rate and solvent resistance ( Cleaning) performance is better to reduce the cost of use.
Third, dilution and cleaning:
1. Ink dilution should use matching additives. It is suitable for IP783 slow-drying water. It is original in Germany and has good purity stability. It does not affect adhesion and is beneficial to printing operations.
2, screen cleaning, printing after the single-printing is completed to be printed, you should use the open version of the full version of the positive and negative spray, partial transparent way.
3, defective cleaning: the implementation of the printing process, the screen or scraping causes of the emergence of unclear or dirty defective, non-diffusion non-marking cleaning agent used after cleaning the spray scrub to restore and reprint.
Fourth, note:
1ã€Spraying back coat cover ink When using SH series, it should be equipped with a constant temperature device. Dry it at 150°～170° for 10-20 minutes. The dilution ratio of oil water is 2:1, that is, 2Kg spray color ink plus 1Kg open water.
2. Mirror-type mirror silver ink protective film is sprayed 2-3 times after coating is reasonable.
3, scraper hardness should be selected in summer and autumn 70 °, 65 ° suitable for winter and spring.
4. When gold powder, silver powder, pearl powder and flash powder are printed, wet the powder with thinner first, and then mix it with clear oil and wait for printing.