How is the ink color always different?
In the process of gravure printing, ink color deviation often occurs, which will affect the beauty of the finished product. Therefore, the author summarizes six reasons for your reference.
The amount of ink is not consistent, that is, the ink viscosity in the ink tank of the printing machine is different at different times, and the amount of ink is different. In the whole process of gravure printing, the relative stability and consistency of ink viscosity should be maintained. Note that the viscosity of the ink changes, often affected by the temperature of the printing environment.
To solve the problem of color difference of gravure printing ink on plastic film, it is necessary to select gravure ink with stable quality and color deviation or small deviation. For a printing variety, it is better to use the ink produced by a certain manufacturer. For a batch of printed matter, it is better to use the same batch of ink produced by the same manufacturer.
If the ink circulation is not smooth, we should pay attention to keep the ink circulation smooth. It is better to use the ink circulation system to ensure the convenience of adding diluent and adding new ink, and keep the ink with good quality and liquidity.
Printing speed and ink drying speed are inconsistent, printing speed and ink drying speed directly affect the ink rate of printed matter, so the change of printing speed and ink drying speed will cause the change of ink color on printed matter.
The improper use of the scraper, the position of the scraper, the angle of the scraper, the pressure of the scraper and the pressure of the embossing roller have a great influence on the ink color, especially the color of the ink in the shallow layer.
The color of printed matter is also affected by different composite processing technology, such as heat sealing of bag making wide edge welding, composite inner film of different colors, or direct vacuum aluminum plating after printing.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, a world famous manufacturing city, is a subsidiary company of Beite packaging (China) Co., Ltd
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The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for food, daily chemicals, and other special-shaped bags
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