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publisher:zheng Time:2015/8/13 15:47:14 Click to rate:2227
1, to achieve the perfect image reproduction is a basic requirement of a positive-negative transparent quality is better, that dot the edge should be neat, opaque. Color separations and printing ink used with the same color.
2, the positive-negative on the glass, and then exposed to a good stretch on the positive image halftone negatives, and parallel to the image axis. If a moire screen left or right until the moire disappear, usually turn to 7 °. Easy to form a region located moire silk screen mesh direction and intersections on the screen. More problems main color and darker color caused by moire.
3, for four-color printing, you should use the same size and stability of the aluminum screen frame, screen frame are used in the same type and model of stretched mesh. Use dyed mesh helps to eliminate moire, screen tension to be uniform throughout the same and four-color printing of four network version of the stretching tension.
4, lapped squeegee is essential for high-quality printing, knives Shore hardness of about 70. Squeegee should be set at a 75 ° angle, if squeegee angle adjustment too flat, printed image may be blurred, if the angle is too steep transfer, screen printing image deformation big risk.
5, back to the blade should not pretend to be too low, and if so, will the film version of the full excess ink, print and rub dirty easily blurred.
6, halftone images with a high viscosity ink, finer screen requires more concentrated color ink.
7, using UV ink, tonal range halftone positive image should preferably 5% to 80%, a Shore hardness of the squeegee should be 75. To control the UV ink does not rub dirty when color overprint, recommended by the cyan, magenta, yellow, black color sequence for printing. When using UV inks, screen thickness not exceeding 5um.