Review of Lithography Suitability (5)

Fifth, the suitability of post-press processing

(A) Post-processing: After printing, the surface finishes are: Water-based PVA. This is an early method. It has good transparency, good resistance to moisture and water, but it must use solvent-resistant inks. It is rarely used nowadays. At present, there are more commonly used UV coating and PP, OPP plastic film, etc., the film has small flexibility, good stiffness, do not have to use high heat and high pressure, single-sided and double-sided blemishes can be, do not have to pay too much attention to the ink drying The problem is therefore the most popular method at this stage. It is divided into smooth and matte, each with its own different feelings and effects. Generally speaking, advanced book covers, book clothing, and Chinese paintings are often used for matte reproduction. For glossy books and magazines that highlight color effects, bright surfaces are often used. Only when the humidity changes, thin paper can cause curling as its disadvantage. Another bronzing process must be carefully considered before or after polishing. After the first bronzing, the glazing has a protective effect, so that the gold foil is not easily worn, but the gloss is poor. If the bronzing after the first glazing is sometimes difficult after UV glazing, this must be considered in advance.

(2) Stapling: Although there are various kinds of binding, those commonly used in binding include hardcover, paperback, saddle-wear, threading, and binding. Various types of binding have different characteristics. In the binding process, it is necessary to pay attention in advance to meet the requirements of processing machinery. , to do all the preparations, can be successfully carried out, otherwise it will produce a lot of unnecessary post-order issues, such as: folding alignment, folding order, binding time extension, homework and so on. Another hardcover, pay attention to paper and paste materials, and whether it will be after the paste due to poor absorption of the material off, but also pay attention to whether it will be affected by changes in weather and its quality after the paste to be fully dry and other factors. Binding books must pay attention to the quality of the hot melt glue, otherwise, the inner page and the cover will fall off due to brittleness.