There are two factors of uneven level printing: uneven gradient level printing and uneven shallow level printing. The main reason for uneven gradient printing is that it is difficult to avoid parallel areas in the engraving process. Although a parallel area can be changed by adjusting the viscosity of the production ink in the printing process, points cannot be avoided. Therefore, in the process of making, it is difficult to control the uneven printing of the gradient layer. It is better to choose a better engraving process in the plate making to reduce the strange uneven printing phenomenon. Jinan packaging printing company will help you to analyze the factors and solutions of uneven printing.
Uneven shallow printing is mainly caused by the following reasons:
One is a group of knife like unevenness caused by too high viscosity of ink or too fast volatilization of solvent in the printing process.
Second, the viscosity of the ink is too low in the printing process, which leads to the uneven gross quality of the printed matter on the overprint plate and the uneven printing.
Third, the plate cylinder is rough and has burrs, which causes the scraper to scratch unclearly.
Therefore, the following measures can be taken to solve the uneven light printing: properly reduce the evaporation rate of the solvent, increase the slow drying solvent; properly increase the temperature of the printing workshop, reduce the temperature of the printing workshop; select the ink and plate cylinder with good quality.
Jinan packaging and printing company's main business is napkin box, portable bag, packaging box, packaging box, picture book and a series of fine packaging. It can print books, magazines, couplets, packaging boxes, handbags, stickers, posters, brochures, calendars, desk calendars, product manuals and other types of paper.