The printability of different paper is quite different. Langcheng, an expert in packing box printing, introduced that some problems would be brought to normal production if the corresponding technological measures were not taken according to the material conditions. However, even if the same type of paper products are used, the quality and printability of base paper will be different due to the differences of materials and processes between different brands or manufacturers. For example, some white paperboard, white cardboard and glass card are slightly acidic, and the ink drying is slow after printing, which will lead to difficulties in semi-finished overprinting and increase the rate of unqualified products; some low-grade white paperboard and glass card have poor surface strength, which is easy to cause quality problems such as powder dropping, hair dropping, foaming or delamination during printing.
Color decomposition, transmission and synthesis of images. In the early stage, color printing was made of nine to twelve printing plates, which not only took time and labor, but also got close to the color effect pictures. It was not until the breakthrough in the theory of primary color, intermediate color, color mixing and color separation and imaging in the end of the 19th century that color technology developed to use only yellow, magenta and cyan The tricolor plate can be used to produce the color printed matter close to the original. However, the purity of YMC ternary color ink is not ideal due to its high or low impurity, which makes it easy to form color deviation in color separation and overprint process. Therefore, the use of black plate can stabilize the image dark tone color and solve the problem of black text printing.
As printing paper is mostly determined by customers, printing enterprises are often in a passive state. However, even if we are faced with the unsatisfactory paper products selected by customers in order to reduce costs, we also need to carefully design the printing process to improve the quality as much as possible. After practice, the author obtains some experience and is willing to share with readers.
The printing factory can't just have some simple ones, such as (horse riding, folding, laminating, rolling machine, etc.) for some picture books with higher requirements, it's not only these simple machines that can do it well, but also some cross pages, pull pages, etc., which need to be studied to do this binding way, such as some teaching auxiliary books and other picture books, which are used in some learning In the hands of pre-school children, their binding methods are relatively high. The children's way of turning over some attractive pictures or books may be more exaggerated than exaggeration. It is easy to cause page dropping and separation. These are the professional ways to control how to bind well.