Improve the accuracy of overprinting and reduce the number of printing colors, which will yield better returns for enterprises. To achieve the reduction of color number, improve the accuracy of overprinting, and put forward higher requirements on film, ink, printing, etc., here are some simple introductions.
1, the selection of film
For products that require high precision in overprinting, be sure to select a film with stable quality. Less or no need for some non-manufacturer, film with no production date, because these films can not guarantee the quality very well, the uneven film will appear in the printing process, such as overlapping, sleeve and other phenomena, resulting in vague picture of printed products. .
2, printing equipment selection
In the selection of equipment, the machining accuracy of the machine is very important, as long as the advancement of mechanical precision can ensure the accuracy of overprinting. In the printing process, the high-speed gravure printing machine accelerates the printing speed, the tension is stable, the overprint detection error is within ±0.01mm, and the ink is used to transport the ink. The printing ink is full and the shallow mesh can be very good. Handling. Make the printed pictures expressive, and complete the perfect reproduction of the planning pictures.
3, printing plate roller accuracy requirements
The accuracy of the plate roll is directly related to the print quality. Concentricity, plate hardness and finish, incremental amount, etc. should be ensured during the processing of the plate roll. The quality of planning is very important. In the picture planning, the printing planning skills should be grasped. The picture part is reduced to within 0.15mm, the plate roll increment is between 0.03mm~0.06mm, and the electronic color separation electro-engraving plate making.
However, due to the market price competition, some plate mills in China use thin steel plates, thin chrome plating, and some chrome layers are printed one or two times. For high-speed printing, seamless pipe making should be used to ensure concentricity and Dynamic balance.
4, ink selection
Some inks of high quality and high reputation manufacturers should be selected. For products with high color registration accuracy, benzene-free and ketone-free inks will be used well. In the selection of ink manufacturers should be 2-3, the original color of the ink is basically the same, so that the color will remain the same when the next printing.
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