Main features of CD screen printing process
1. Screen-printed discs have the following characteristics:
1. Ink layer thickness
In color mesh tone printing, the thickness of the ink layer affects the depth of the color of the graphic and the degree of reduction and color deviation of the color cabinet. The direct "consequence" of the thick ink layer is bright colors, giving a very full feeling, and the three-dimensional sense is relatively strong. This is a point of pride for screen printing. Printing is also relatively handy. In fact, the pattern on the printing surface of the disc, especially the products in the earlier years, are mainly based on the theme of large-scale field, text, etc., which is also catering to the characteristics of screen printing.
To put it another way, if you look back on the "cause" of the feature of thick ink layer for screen printing, it is easy to imagine that the consumption of ink is large, compared with offset printing. The ink layer after screen printing is about 3 times thicker than offset printing, which invisibly increases the cost of disc printing. For some disc manufacturers with different printing methods such as screen printing and offset printing, facing Different batches of CD products are worth considering.
If you think about it further, what effect can the thick ink layer have on the printing quality of the optical disc? First, the ink photocuring speed is slow, and secondly, the ink film shrinks more obviously, which easily causes the disk to shrink or even bend, which causes quality problem.
2. Low accuracy
Restricted by the screen printing process and raw materials, the screen printing image accuracy is generally only up to 133 lines / inch, usually 80-12O lines / inch, and the dot reproduction range is generally 10% ~ 85%. Delicateness and layering are not enough.
3. low cost
The main reason why screen printing has become the first choice for CD printing investors is the low cost of equipment. In addition, some screen printing consumables (such as inks) are not very expensive.
Second, silk screen design requirements
※ Film must be a positive image (positive image with the film facing upward), 100 ~ 133 lines, must not exceed 133 lines, 110 lines are recommended
※ The center hole and the outer circle must be concentric circles
※ The center hole has a cross, and the length of the cross is not more than 10mm
※ The registration line is required to be 1 ~ 2mm from the outer circle of the film above, below, left and right, and the registration line must be on the vertical center line of the film's horizontal box
※ The color code must be marked
※ Film should be cut to a suitable size, preferably 135 ~ 140mm
※ The size of the outer circle of the film must be within 118mm, the minimum of the inner circle should not be less than 20mm, and the best size of the film is 34 ~ 118mm
※ DVD is generally not screen printed. If it is used, the inner diameter of DVD film is preferably ≥40mm
Beauty Instrument,Rf & Ems Beauty Instrument,Rf And Ems Beauty Instrument,Rf&Ems Beauty Instrument
Foshan Liqia Hardware Products Co., Ltd. , https://www.liqiahardware.com