Characteristics of water-based ink for corrugated paper printing Water-based inks are roughly divided into two categories: a rosin-maleic acid modified resin series (low grade) b acrylic resin series (high grade)
Two requirements for the performance of water-based ink
1. After long-term storage of the precipitate, it should be easy to redisperse after stirring 2. It must have good flow properties and viscosity 3. It should have good storage stability; 4. The drying performance should be fast and appropriate; 5. The printing plate and The printing press has any adverse effects.
6. Must not have too much irritating smell;
Three water-based ink technical parameters:
1 Color: Similar to the standard sample Note: Compare the test sample with the standard sample by using the manual color wheel to develop the color contrast 2. Fineness: less than 20 micrometers: 0-50 micrometer scraper fineness meter. 3. Viscosity: 20 seconds ± 5 seconds Apparatus: RIGOSHA 4 # cup (25 ° C). 4. PH value: 8.0-9.5 Instrument: Portable pH meter (PHB-2 type) .. Heavy metal content: In line with world packaging green environmental protection standards. 6. Resistance meets requirements
Requirements for the correct use of four water-based inks:
1. It must be fully stirred before use to keep the ink composition uniform; 2. After opening, the ink storage should be capped and closed immediately, to
Dust drops and dry skin; 3. If the residual ink contains impurities, it should be filtered first, and then used with new ink; 4. During storage, please avoid close to high temperature or hot sun. 5 If the viscosity of the applied ink is found When it is slightly larger, you can add an appropriate amount of water for adjustment.
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