Printing is a tedious process, including a lot of steps and work, among which the color treatment problem is a very important aspect, so how to do a good job in jinan printing factory color treatment?
In the printing process
There are many reasons for false ink, involving many factors, including paper performance, ink performance, plate quality, printing blanket quality, printing pressure, printing machine performance and printing process.
If the performance of paper and ink is stable, the quality of the printing plate meets the requirements of printing, and the working performance of the printing machine is relatively stable, there is still the phenomenon of color printing ink, the main reason is the problem of printing pressure.
In the lithography offset printing process, often encountered the phenomenon of false color printing. In printed matter, mainly for printed matter solid part of spots or empty, incomplete graphics or lines, image tone level reproducibility is poor or dot loss.
In the offset printing
Ji 'nan printing plant that the size of the pressure directly determines the transfer of ink in the printing process. If there is local pressure imbalance in the printing process, it will lead to false printing ink color. Because the blanket drum is installed between the plate drum and the imprint drum, each tiny unit on the blanket needs to contact the two drums once every turn.
Ink transfer is the result of blanket compression deformation. The compression deformation of blanket is the fundamental guarantee of pressure. Therefore, the size and uniformity of pressure is directly related to the rubber sheet used by offset printing. Its forces vary periodically. It is because of the periodic change of the force on the blanket, it will cause the internal friction of the blanket, resulting in the aging of the blanket, affecting the uniformity of the printing pressure, and may lead to the scrap of the blanket.
Blanket under the action of compression force, there is a good printing plate graphic part of the ink transfer to the substrate surface, that is, the ability to accept and release ink, but blanket will change the ink, the ability to transfer will also lead to the phenomenon of false ink. The blanket wrapped around the drum is subjected to tension and pressure. With the increasing number of rolling, the stress accumulation of blanket compression deformation will become stiff, lose the original softness and high elasticity, and even the surface will appear bright or cracking traces, resulting in uneven local compression.
Printing plant with the development of society, the development space is constantly improving, when we are in the printing, the status of color is very high, and the staff need to have the method of color processing, more content to consult the website!济南印刷厂讲解的内容 更多的内容 请咨询公司官网http://www.xinfengyinshua.cn/