Application skills of the hottest water-based ink

2022-08-09
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The application skills of water-based ink on corrugated paper

the application of water-based ink in corrugated printing has been developing for a long time abroad. Corrugated paper is a flexible version of water-based ink printing, which is developed from lead printing, lithography and flexographic washable printing. Flexographic water-based inks have also developed from rosin maleic acid modified resin series "low-quality printing" to acrylic resin series "high-quality printing", and printing plates have also transitioned from rubber plates to resin plates. The printing press has gradually changed from a large wheel cylinder monochrome transmission or two-color machine to a three-color or four-color Flexo machine, and the eyewheel has gradually evolved from the target metal wheel to the target ceramic roller. Aluminum doors and windows are used in public buildings. With the rapid development of printing technology, the use skills of water-based ink become quite important. Before discussing the use skills of water-based ink, we must first understand the characteristics of water-based ink and the relationship and influence of various factors in printing, such as plate material factor, paper factor, wrinkle roller factor, ink factor and operator factor

usage skills of water-based inks on corrugated paper

water-based inks are roughly divided into rosin maleic acid modified resin series and acrylic resin series

handling methods and requirements of flexo

handling methods

※ when transporting and storing unexposed flexo raw materials in boxes, it should be placed in a flat place at ordinary times

※ no more than 14 boxes can be stacked on the flexo each time (counting by packaging with the same size). It is recommended that every 7 boxes of the layout should be separated by wooden boards of the same size

※ if there are packages of different sizes, the large size should be placed at the lowest position, and the layout should be separated by boards of the same size, then the smaller size plates can be added to the layout

※ the temperature of the stored plate is 150C ~ 200C, and the corresponding humidity is 55%, preventing direct sunlight or ultraviolet radiation

※ pay attention not to place other materials and dyes on the flexible layout, nor sit and stand on the box surface

requirements

※ clear image and deep anti white

※ the stable base should not be too thick or too thin

※ good springback performance

※ moderate hardness

※ less dot expansion rate

requirements for ink performance

※ after long-term storage of the cushion, It is easy to redistribute after mixing

※ it should have good fluidity and viscosity

※ good storage stability

※ the drying is fast and appropriate

※ it should not have any impact on the printing and printing machine

※ it should not have too strong pungent smell

Technical specification of water-based ink

※ viscosity < 20 seconds plus or minus 5 seconds > instrument: rigosha Cup4, Japan

note: the special ink depends on the actual demand, and the comparison with the standard version is no more than plus or minus 2 seconds

※ fineness 20 micron scraper fineness meter: <0 – 50 microns

※ pH value: 8 - 9.5 ﹤ optimum 8.5 – 9.2 ﹤ the digital P property market has also shown color recently h/mu meter suntex ts-1

※ color: similar to the standard sample version

note: the standard samples of the tested samples are similar but not connected, and the color is developed and compared on the 120 eye color developing instrument

※ environmental protection: conform to the world environmental protection standards for packaging

correct use of water-based ink

※ before use, it should be fully stirred to keep the ink composition uniform

※ after opening, the ink storage should be sealed immediately. Dry and firm with dust-proof Egyptian crust

※ if the remaining ink contains impurities, it should be filtered first, and then used together with new ink

※ please avoid exposure to high temperature or hot sun during storage, and it can be stored for one year without deterioration

※ if it is found that the viscosity of Applied ink is slightly high, you can add an appropriate amount of water to adjust

in conclusion, one of the important factors for the quality of ink printing is the use skills of ink. With the rapid change of printing technology, With the upgrading of printing equipment, water-based inks will develop in the direction of high concentration, low viscosity, weak volatility and strong permeability. Four color overprint with a strong sense of hierarchy is also around the corner

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