Disc offset printing technology

The characteristics of CD offset printing in CD printing mainly include the following:

1. Thin ink layer: Offset ink layer is generally 2~3μm, compared with screen printing, offset ink layer is thin, and the three-dimensional feeling is also poor. Correspondingly, the speed is faster, the ink consumption is less, and it is not easy to cause the deformation of the disc due to the shrinkage of the ink, which has little influence on the flatness of the disc, and is particularly suitable for the printing of the disc.

2. Good effect of printing graphic reproduction: Offset is an indirect transfer method, which transfers the graphic on the printing plate to the printing surface of the optical disc. Therefore, the offset of the offset printing dot is small. CD offset printing is different from traditional paper printing, all waterless offset printing, its biggest feature is that it does not require ink and water balance, and no watermark version of the structure is more detailed, offset lines can reach 175 ~ 200 lines / inch, printed out The pattern is relatively clear, strong texture, such as the effect of printing some transitional color is better, suitable for printing graphics, such as characters, landscape, etc., especially for some products that require multi-color overprinting halftone product, the effect is better.

3. Less drying times: The substrates printed on the CD are plastics with high brittleness, and the warpage of the disks is prone to occur during printing. In particular, during the process of photocuring of the ink, the quality problems of the disks are prone to occur. In screen printing, each color must be dried separately. Offset printing only needs to be performed after the four-color printing is completed. This is especially suitable for printing on DVDs because the thickness of a DVD is equivalent to two 0.6-mm-thick CDs. The optical discs are bonded together with small thickness tolerance (200 μm for CD and 100 μm for DVD), flatness is also high, and the number of drying times is small, which inevitably reduces the possibility of disc warpage.

4. The cost is high; the cost of offset printing equipment is relatively high. When the optical disc offset printing equipment is just put into the market, its price is about 5-6 times that of other machines. Even now, the price of one offset printing equipment can still purchase 2-3 screens. Printing Equipment. Many people in the industry are very optimistic about the application of waterless offset printing in the printing of optical discs. Some people even say that this is the trend of the times. This printing method with huge potential is respected by many related suppliers and has been rapidly developed.

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