The application of four-color printing in optical disc printing
Every disc on the market is printed with a very delicate and clear pattern, which is the effect of disc printing. Optical disc printing, because the substrate is not paper, so the requirements for printing technology are relatively high. In order to meet the needs of disc patterns, four-color printing has been used in disc printing, and today we will talk about the application of four-color printing in disc printing. 1. Screen printing method: In the CD, about 90% of the CD and VCD are printed by the screen making process to complete the surface graphic decoration, which is because the screen printing obtained the three-dimensional sense of the picture and text is strong, the ink layer is thick, the color is plump, the excellent durability, the operation is convenient, compared with other methods, the investment in equipment is relatively low and the price of mass printing is low. Using screen printing, the number of printed dots should not be > 48L/Cn (123L/in), and the tonal value can only be at 85% 15%, and the dots greater than 85% or less than 15% are easy to lose. 2. Offset printing and the combination of offset printing and screen printing: offset printing and printing discs. Fine and high-resolution color graphics can be printed, and the number of dots > 60L/cm. There is no problem with a tonal value > 90% or <10%. Because the printing ink layer is much thinner than the screen printing ink layer, the offset printing speed is fast and the light curing time of the ink is short, so it is suitable for optical discs, especially DVDs with high flatness and high definition. Therefore, in recent years, the domestic powerful disc producers have launched the special offset printing machine for optical discs to print graphics and texts, use screen printing to make the base white, and then use offset printing anhydrous offset printing UVC, M, Y, K and four-color spot color ink, light curing are completed on a printing machine, so as to play the respective characteristics of screen printing and offset printing, to ensure the quality of the disc under the premise of taking into account the laser inclination requirements of the disc, which is the basic printing method adopted by DVD and other discs at home and abroad in recent years. 3. Developing printing disc method: a. Inkjet printing method suitable for single piece or small batch VCD disc production, the advantage of this method is high resolution and high price. Therefore, the CD for the general production of souvenirs and personal electronic photos: b. Digital printing on CD-R discs is still a small amount of printing method, and its printing premise must have a special printing coating (ink) that can be written for digital printing, which will develop with the development of special printing coatings; C. Promising flexographic printing disc, which is a new printing method under development, once this method prints disc, the printing quality of the disc will be further improved. The above is an overview of the application of four-color printing in optical disc printing, according to your actual operation, do you agree with the views of this article?