1. Thickness of the ink layer In the color halftone printing, the thickness of the ink layer affects the depth of the graphic color, the reduction degree of the color cabinet, and the size of the color shift. The direct “consequence†of ink layer thickness is vivid, giving people a feeling of fullness and strong three-dimensionality. This is a point that screen printing is proud of. For large areas of the field, text and other patterns, the screen Printing is also more handy. In fact, the pattern of the printing surface of the optical disc, especially the products of the earlier years, is mainly based on a large area of ​​the field, text, etc. This also caters to the characteristics of screen printing.
From another perspective, if you trace back the "cause" of the thick layer of screen printing ink, it is easy to imagine that the consumption of ink is larger, compared with offset printing. After screen printing, the ink layer is about 3 times thicker than offset printing. This virtually increases the cost of optical disc printing. For some optical disc manufacturers with different printing methods such as screen printing and offset printing, the face This is very worthwhile for different batches of optical disc products.
Something farther away, how thick can the ink layer affect the print quality of the disc? First is the slow speed of ink curing, followed by shrinkage of the ink film, which can cause the disc to shrink, or even bend, causing quality problems. problem.
2. The low accuracy is limited by the screen printing process and raw materials. The screen printing image accuracy is generally only 133 lines/inch, usually 80-12 O lines/inch. The reproduced reproduction range of dot is generally 10% to 85%. Network cable products are not as exquisite as they are.
3. Low cost The reason why screen printing has become the first choice for CD printing investors is mainly due to the low cost of equipment. In addition, some screen printers (inks, etc.) are not very expensive.
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