4. 由于铜版纸表面光滑，吸墨能力差, 打印大页场版时, 努力达到 “深墨薄印”. 也就是说, 墨水颜色调整得当, 印刷时墨层相应变薄, 既能满足印刷色彩的要求, 还能减少套印的机会，防止套印. 此外, due to the poor adhesion of the paper, the ink layer printed on it is sometimes easy to be decolorized due to the loss of powder. 所以, 19 resin oil can be used as the inking oil for the first color printing. In order to make the laminated ink layer bright, you can add some light oil and dry oil in the ink.
5. Due to the large amount of coating on the coated paper, it is often encountered in the process of printing that the powder will be removed and the printed page will appear black shadow. In this case, attention should be paid to check whether the plate loading process is proper. If the plate is padded excessively, because the paper pressure is too high, it is easy to crush the coating powder on the surface of the copper plate paper, resulting in powder removal and dark spots. 此外, it is also necessary to check whether the viscosity of the ink is appropriate. If the printing ink layer is too thick and sticky, it is also one of the reasons for the paper falling off and piling up the page. In this case, it is necessary to consider the application of auxiliary materials to adjust the ink, and the above quality problems can be better controlled.
6. The anti sticking technology of copper plate paper printing should be well controlled. Copper plate paper is weak in ink absorption, and its back is relatively smooth. 这样, when printing a large amount of ink or multi-color overprint, it is easy to produce the problem of sticking. 所以, anti sticking measures should be taken to overcome this problem. 例如, a proper amount of anti sticking agent should be stirred evenly with bright oil first to make it liquid, then added into the ink and then stirred evenly, so that a good anti sticking effect can be achieved when printing. 然而, the amount of anti sticking agent should be controlled reasonably, not more than 4%, so as to avoid the disadvantages such as ink emulsification, printing ink layer blooming and ink layer glossiness reduction.
