January 10, 2024
Laminating and Varnishing Process and Method At Self-adhesive Label Printing
The coating of self-adhesive labels basically uses a relatively thin transparent BOPP film (the coating material currently used economically is also called glazing film, matte film, which is laminated on paper materials to protect the printing The purpose of graphics, waterproofing, anti-corrosion, increasing brightness, and increasing the three-dimensional sense of labels. Other film materials, such as PET and PVC are not commonly used in lamination, mainly because the cost is too high and the material application is not as good as PP material; paper materials Due to cost and environmental protection requirements, lamination is basically replaced by a varnishing process.
Enhance the appearance of printed matter. The varnishing of printed matter includes full coating and partial coating, as well as high-gloss and matte-non-reflective gloss coating. No matter which one, it can improve the appearance of the printed matter, make the printing texture thicker and fuller, the colors more vivid and brighter, improve the gloss and artistic effect of the printed matter, play a beautifying effect, make the product more attractive, and enhance consumers' satisfaction. Desire to purchase.
There are three types of varnishing machines: printing press online coating unit, dedicated coating machine and printing press structure.
Among them, the multi-color printing machine online glazing unit has a structure of four-color, five-color, six-color plus 1-color or 2-color glazing units, which can use water-based or local UV coating, as well as oil-based and solvent-based varnishing or glazing; it can apply both high-brightness coatings and matte (matte) coatings, and is also equipped with a drying device. The production efficiency is high and the quality is stable, which greatly demonstrates the good production advantages of the multi-color printing machine. Improve the market competitiveness of color prints.
Ordinary varnishing machines have a simple structure, easy operation, and low equipment investment. They are commonly used coating equipment for packaging and printing. The product has wide adaptability and is suitable for use in large, medium, and small printing and carton factories. Special coating machines are divided into two forms: manual paper feeding and automatic paper feeding. Some equipment can be used for both full coating and spot coating.
Reasonable selection should be made based on the actual production conditions of the factory to improve production efficiency.
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