Color print overprint skills

Color print overprint ink effect how, is an important factor to measure the quality of products.Therefore, correctly grasp the process printing products in the printing process, the good operation, is an effective guarantee to improve the quality of products.As we know, dieyin tinted print, to make the print layout mose, brightness is good, satisfactory visual effect, ink and printing process of organic coordination, is very important, but the specific situation should be handled according to different conditions.Such as when the poor printing paper surface is smooth, absorbency, some color printing ink layer thinner, to avoid dieyin tinted occurs when sticky dirty.In addition, the base of color printing thin some appropriate, folding color printing effect is good, and is conducive to overprint ink layer drying.

　　For rough surface, a large quantity of ink absorption offset paper product, the base amount of ink will be more appropriate, in order to obtain flat thick gloss.In folding color printing plate, the ink layer is thin than the base, the deployment of ink is better than the same hue slightly lighter, because the base basic close to the primary colors, dieyin don't dodge, printing quality will be deeper than original sample.In order to ensure the normal process and prevent from the bottom of the dry ink is not easy to produce imprinting is too bad effect, color printing and folding color version, should be depending on the layout of ink absorption amount respectively, and put the right amount of dryness oil, to ensure the quality of printing.General white dryness oil add capacity for: resin ink 2%, 5%, 3% - 10%; oily inkRed dryness oil capacity of about 2%.As influential to ink drying oil, so the light color ink to use more white dryness oil, while red dryness oil used in red and dark ink, lest make ink color deviation.

　　If dieyin version in red or yellow impression, and on the base of color printing gold, you in addition to the blank parts, plate making and can be used as a field edition, printed transparent yellow or light thinner, to increase the field version of the gloss.In order to ensure the quality of overprint, prevent mark bottom, in addition to gold and the impression of thinner with white ink dieyin black, generally can be printed black and large area first impression space, which can avoid the printing quality on the base color ink layer friction scratches on the machine.In addition, in order to ensure the accuracy of overprint, on the base of color needle position (i.e., rules) is determined, tinted plate adjustment overprint position, can adjust the position of the plate and can't go to adjust the position of the gauge and side gauge before so as to avoid paper edge is invisible to the naked eye "water line" wave shape is not straight, influence the stability and accuracy of the overprint.

　　On the patterns of the overprint of Yin and Yang, but one of them in version do appropriate to expand, to overcome because of defects and environment temperature and humidity machine precision cause printing quality scale changes caused by misregister, cause leakage white layout, affect the quality of the product.

　　Also, pay attention to adjust the printing pressure.The heavy pressure will make clear dot deformation, resulting in misregister.In addition, should also specification, ladle lining thickness thickness is too big or too small will make printing edition gives, lead to misregister.