CD screen printing features and design requirements

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First, the screen printing optical disc mainly has the following several characteristics:

1. Thickness of the ink layer in the color mesh printing, the thickness of the ink layer affects the depth of the graphic color and the reduction 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. Low precision

Due to the limitations of screen printing and raw materials, the screen printing image accuracy is generally only 133 lines/inch, usually 80-12 O lines/inch. The dot reproduction range is generally 10% to 85%, so the cable products Delicateness and sense of hierarchy are not enough.
3. The reason for the low cost of screen printing has become the first choice for CD printing printers. The main reason is that the cost of equipment is low. In addition, some screen printing supplies (such as ink, etc.) are not very expensive.

Second, screen printing disc design requirements

※Film must be positive positive figure (positive figure facing upwards), 100 to 133 lines, must not exceed 133 lines, 110 lines are recommended ※Center hole and outer circle must be concentric circle ※There is cross line in center hole and cross The length of the line is not to exceed 10mm. ※Film top, bottom, left and right distance from the outer circle need to have a register line at 1~2mm, and the register line must be on the vertical center line of the film horizontal box. ※The color must be marked. The label ※ film should be cut to a suitable size, suitable for 135 ~ 140mm ※ film outer diameter must be within 118mm, the inner circle can not be less than 20mm, the best film size is 34 ~ 118mm
※ DVD is generally not screen printed. If it is used, the DVD film inner diameter is better than ≥ 40mm.

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