The printing process of the brochure printing factory

The printing process of the brochure printing factory

Printing refers to the process of completing the work during the mid-term of printing, that is, printing a publication through a printing machine. There are two forms of printing: direct printing and indirect printing. Direct printing refers to the printing method in which the ink on the graphic and textual parts of the printing plate is directly transferred to the surface of the substrate. The printed image is inverted relative to the original, and is transferred to the substrate by the contact between the ink on the printing plate and the printed material.

All letterpress and gravure printing machines, as well as the oldest hand cranked lithography machines in lithography, are direct printing; Indirect printing refers to the printing method in which the ink on the graphic and textual parts of the printing plate is transferred to the surface of the substrate through an intermediate carrier, and the printed image is positive relative to the original image.

The physical phenomenon of indirect printing is that the ink in the printed area is completely piled up and carried, and the parts without the printed area will appear concave or convex. Due to the height difference from the printed area, they cannot adhere to the ink and can only be blank. So when the ink in the printed area is transferred to the printed material, whether the printing surface is higher or lower than the non printing surface is a physical mechanical action

Generally, there are gravure printing, relief printing, stencil printing, planographic printing, etc. Another type of chemical printing refers to the non printing surface of a printing plate that does not adhere to ink, not due to low depressions, protrusions, or obstructions, but due to chemical reactions that create a thin film that absorbs water and resists ink. The part with printed lines absorbs ink and resists water, while the part without printed lines absorbs water and resists ink. Water and oil repel each other, which is still a physical phenomenon. However, during the printing process, it is necessary to continuously supplement the water absorbing and ink repelling film in the solution of the water tank for the part without printed lines. Acid and adhesive substances must be added to continuously supply the viscous acid layer of the carboxyl group, so as to keep the non printing surface of the printing plate from being soaked by oil, which is why it is chemical printing. The printing principle of a flat rubber printing machine belongs to this category.

The printing process of the brochure printing factory