From the perspective of product quality, what kind of product is suitable for printing with spot color

From the perspective of product quality, what kind of product is suitable for printing with spot color

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When printing a large area of light-colored uniform color blocks, it is usually added to the original ink to add a spot color ink to perform the on-site printing, so that the ink layer is thicker, and it is easier to obtain a uniform color and a thick effect. If a four-color printing process is used, a low number of flat screen dots must be used. However, the low number of flat nets are easy to be caused by tiny sand particles or slight exhaustion during the printing process, resulting in small dots in individual parts, resulting in uneven ink color: it is easy to supply too much water due to the printing. The paper powder accumulates on the printing plate and the blanket, and the smoothness of the paper is low, which causes the ink transfer at the small dots to be poor. As a result, the ink becomes lighter and the ink is uneven.

For dark large-area color blocks, using a four-color printing process, it may be necessary to superimpose the high-salty dots of several colors, the ink layer is too thick and easy to appear back and dirty; and the spot color printing process requires only one printing. The color is not easy to appear dirty on the back. Using four-color printing process, some parts of the graphic may be synthesized by several colors; while the spot color printing process is used, only one color is printed in the corresponding part, which avoids the possibility of overprinting error.