The printing techniques and procedures of the book sample play a crucial role in improving the quality of books and publications and expanding market promotion. In some respects, whether it is designers, publishers, printing companies or customers, according to the quality of the specific printing of books and magazines, choose and determine their own required printing process, and put forward stringent quality requirements for the printing process, in order to achieve the final Need effect.
The printing process of the sample lithographic books includes the following parts:
Imposition - printing - development - rubbing - baking version - loading - printing
Lithographic printing is mainly offset printing. Taking offset printing as an example, the sample printing process of books and publications and prepress, printing, and postpress work are introduced.
First, prepress preparation
Preparations include: paper humidity conditioning, ink modulation, wetting fluid preparation, plate inspection, printing pressure debugging.
Paper moisture conditioning treatment is mainly to prevent the environmental moisture caused by the non-uniform moisture content of the paper caused by paper deformation and electrostatic phenomenon, this phenomenon is absolutely forbidden in the printing.
Second, the plate test
After the prepress preparation work is done, it can be loaded, loaded, and commissioned. During the start-up operation, the paper-feeding mechanism, the delivery mechanism, the inking device, the water delivery device, and the printing pressure must be adjusted to ensure that the paper feeding is smooth, the water supply volume and the ink supply amount are moderate, and the printing pressure is suitable. Produce high quality prints. After the above work is ready, the machine will be opened for a while, so that the amount of ink to be supplied and the amount of water supply are moderate and uniform. After that, a certain amount of overprinted paper is put on the paper feeding table for trial printing. If it is multi-color printing or multi-color printing, registration adjustment work is also needed to determine whether the layout is appropriate, whether the graphic and text are skewed, and whether the sky, the foot, the size and the direction of the left and right are registered (generally, the registration is made with the rules). adjust). After the registration operation is completed, a trial printing is started, a few samples are printed, and a quality inspection is performed.
The ink modulating work includes the preparation of special inks, adding some auxiliaries to conventional inks, and the like. If the viscosity of the ink is not suitable, it should be added with the ink of increasing or decreasing the viscosity; the ink is not good for the dry bath and can be added with a dry bathing agent. Adding various additives must be based on the conditions of the process, equipment, paper, and ambient temperature, and the amount should be appropriate.
Inspection of printing plates includes: inspection of printing plate types, color types, thickness detection of printing plates, inspection of the size of the printing plate, inspection of the rules, inspection of the depth of printing plates, and the quality of the printing and printing images. Damage, scratches, etc.
Debugging of printing pressure: According to the factors such as the thickness of the printing plate, the paper specification, the thickness of the blanket, the thickness of the lining material, the requirements of the printing process, etc., the proper roller lining is selected so that the printing pressure meets the requirements of the printing process and quality.
Third, the official printing
Before the official printing, add some overprinting papers. After the overprinted papers are printed, the counters are reset to zero. Sampling inspections are frequently performed during printing, paying attention to changes in water, changes in ink, printing plate resistance, cleanliness of blankets, and whether the printing press is supplied with oil or gas and whether the operation is normal or not.
Fourth, post-press processing
After the end of each day of printing, or after each batch of prints is completed, the post-print processing operations are required. The contents include: ink fountains, ink rollers, water rollers, blankets, impression cylinders, printing plates, and press sheets. And press maintenance and so on.
V. Cover and color pages special printing process
1, film
The lamination process is a process in which printed matter and plastic films are bonded together after they are heated and pressed.
The surface of the printed paper after coating is more smooth and bright, and the gloss and wear resistance of the printed product are improved.
2, embossing
The embossing process is a process that uses a concave-convex mold to produce plastic deformation under the action of a certain pressure, thereby performing art processing on the surface of the printed matter. The surface of the embossed prints shows different patterns and textures, which have a distinct three-dimensional relief and enhance the artistic appeal of prints.
3, die cutting
The die-cutting process is to make a special die-cutting knife according to the design requirements of the printed matter, and then press and print or other substrates under pressure to form the desired form or cut mark.
4, UV coating
UV coating is ultraviolet light coating. It is a UV-specific coating that is precisely and evenly applied to the print or a localized area. It is cured by ultraviolet radiation and dried at a very fast rate.
5, hot stamping
Hot stamping is based on gold and silver foil. With a certain pressure and temperature, the printed matter and the hot stamping foil are pressed against each other for a short period of time. The metal foil or pigment foil is transferred to the printed matter on the hot stamping plate. Surface processing technology. The area of the printed matter after hot stamping exhibits a strong metallic or other texture.
Mobile-Phone
+8618127094520
