Some skills of printing corrugated paper with the

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Several skills of using water-based ink to print corrugated paper

the application of water-based ink in corrugated paper printing has been a long time abroad and more than 20 years at home. Corrugated paper printing is developed into today's flexible letterpress water-based ink printing from lead printing (relief printing), offset printing (lithography) and rubber plate water washable printing. Flexible letterpress water-based inks have also developed from rosin maleic acid modified tree finger series (low-grade) to acrylic resin series (high-grade). Printing plates are also transitioning from rubber plates to resin plates. The printing press has also gradually developed from the monochrome or two-color machine with large stick cylinder to the three-color or four-color elexo machine. The eyewheel has also gradually developed from 150 ~ 200 metal rollers to 180 ~ 250 ceramic rollers. With the rapid development of printing technology, the skill of using water-based ink is very important. Before the author discusses the use skills of water-based ink, I. 1. The deformation magnification ratio of the recording device of the seat belt tension testing machine should be 50:1. We should first understand the characteristics of water-based ink and the relationship and influence of various factors in printing, such as plate factors, paper factors, eye wheel factors, mechanical factors, ink factors, operators and other artificial intervertebral disc factors

1. Characteristics of water-based inks for corrugated paper printing

water-based inks can be divided into two categories: ① rosin maleic acid modified resin series (low-grade); ② Acrylic resin series (high grade)

2. Requirements for water-based inks

① after long-term storage and sedimentation, it should be easy to redistribute after mixing; ② Have good flow performance and viscosity; ③ Good storage stability; ④ The drying performance should be fast and appropriate; ⑤ It shall not have any adverse effect on the printing plate and printing machine; ⑥ Do not have too much pungent smell

3. Technical parameters of water-based ink

① color: similar to the Standard Version (Note: use the manual color developing wheel to develop and compare the color of the test sample and the standard sample that are similar and disconnected); ② Fineness: less than 20um, instrument: 0 ~ 50um scraper fineness meter; ③ Viscosity: 20 ± 5S, instrument: rigosha4# cup (25 ℃); ④ PH value: 8.0 ~ 9.5 instrument: Portable pH meter (phb-2 type); ⑤ Heavy metal content: in line with the world green packaging standards; ⑥ Various endurance: meet the requirements

4. Requirements for the correct use of water-based ink

① before use, it must be fully stirred to keep the ink composition uniform; ② After opening and using, the ink storage should be covered and sealed immediately to prevent dust from falling and crusting; ③ If the remaining ink contains impurities, it should be filtered first, and then used together with new ink; ④ Please avoid exposure to high temperature or hot sun during storage, and store for one year under normal conditions without deterioration; ⑤ If it is found that the viscosity of the applied ink is slightly higher, an appropriate amount of water can be added for adjustment

source: it has a very broad prospect of utilization. Guangdong Printing

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