In fact, in addition to the film coating process, UV glazing can also play a certain role in protecting and decorating the surface of the printed matter. The two are similar in many functions. Due to the relatively low cost of UV glazing, the development is relatively rapid, and the product is very attractive, so it also has a certain market share in some post-press processing fields. Some people who are optimistic about UV glazing technology even believe that this technology can be independently developed instead of laminating technology.
         In fact, this is just a wish of people. According to some printing companies that use UV glazing technology, UV glazing applications are mostly partial glazing. Local UV glazing can improve the grade of books, but in most cases, this partial UV glazing process is also This is done after the film is applied, and the previous film coating process must be a solvent-based film.
         In addition, there is still a lot of deficiencies in UV glazing compared to film coating. Such as UV glazing protection, folding resistance, wear resistance, etc. are not as good as the film, there are limitations in many areas, such as packaging boxes; UV glazing also needs to put into printing equipment and UV curing equipment, and the film has Off-the-shelf equipment foundation and mature technology; in addition, some UV varnish will also volatilize odor during the coating process, which will affect the operator.
         Today's printing houses and publishing houses pay great attention to this process, and believe that UV glazing can replace the laminating process in book printing. But in general, UV glazing is still limited in many aspects, there are still many problems in the process, and it is impossible to completely replace the laminating process.

Paper calender features:
1. The fuselage adopts cast iron structure, with high manufacturing precision and long service life.
2. The main engine adopts stepless speed regulation and the performance is stable.
3, the use of imported stainless steel belt to ensure good processing quality.
4, using a quartz tube as a heat source roller heating device, heating temperature can be automatically controlled
Paper calender use:
The paper calender is an ideal equipment for surface fine processing of printed materials at home and abroad. The color prints of various packaging and decoration are glazed and then calendered by the machine, the surface gloss is obviously improved, and the color can be protected. The role of the print quality is greatly improved. Applicable to all major, medium and small printing plants.

The paper calender is generally used behind the dryer section of the long net machine. It is mainly used for the subsequent calendering and finishing of various papers to improve the smoothness, gloss and thickness uniformity of the paper. The paper calender is mounted on the frame vertically with respect to some small common sense of the paper calender. The next one is the motive roller, and the other rollers are frictionally driven by each other.
Main products of paper calender: heavy duty industrial gear oil, bearing grease, hydraulic oil, etc.
Lubrication requirements for paper calenders: Main lubrication parts: drive electric bearings, reducers, calender rolls, lifting and pressing mechanisms.
Paper calender working conditions: moisture, high temperature, heavy load, a certain speed, even high speed, the working environment is relatively bad.
In the operation of the paper calender, the paper sheet is in contact with the heat roller. In a short time, the heat roller transfers the heat energy into the paper and penetrates to a certain critical depth (usually considered to be 0.007 μm). The temperature reaches or approaches the softening point of the glass, at which time the plasticity of the paper surface is strengthened, and the soft roller of the paper calender is elastically deformed when pressed, and the nip is formed into surface contact. The mirrored hard roll is smooth and shiny like a stamper, and it retains a good thickness.
Paper calender use and maintenance precautions:
1. Check the contact surface of the roller in daily production to ensure that there is no dirt and no damage. The surface roughness of the calender roll is less than 0.5um, and the surface roughness of the heat transfer roller is less than 0.1um, that is, the mirror state.
2. Ensure that the paper web covers the effective roll surface, and it is strictly forbidden to directly contact the soft roll and the hard roll. Otherwise, the soft roll surface will be carbonized at a high temperature, losing performance.
3. During the heating and cooling process of the heat transfer roller, the sharp change of the temperature will cause the roller body to be in a state of thermal stress, resulting in deformation and fracture of the roller. Therefore, it is strictly forbidden to use cold water to cool the roll surface. In addition, when the downtime is long, the heat transfer roller temperature should be lowered to 60 °C to stop operation. Otherwise, the heat roller will be deformed by gravity due to excessive temperature.
4. When the paper calender is working, it is forbidden to disassemble all kinds of oil pipes, because the hydraulic oil pressure is up to 4MPa, the oil temperature is above 100°C, and the oil will hurt people.
5. The place where the calender rolls are stored should be dry to avoid direct sunlight and away from running electrical equipment. The ambient temperature at the storage location is preferably not less than 10 °C. The roller should be supported on the bearing seat. It is strictly prohibited to be placed directly on the ground. The roller surface should be wrapped with packaging materials. During the storage process, turn the roller at least one and a half times a month.
6. After grinding the roller in the field, it can't work immediately after going to the workshop. It should be adapted to the on-site ambient temperature and can be put on the machine at least 24h.

         The glazing machine refers to a device that coats (or sprays, prints) a layer of colorless and transparent paint on the surface of the printed matter, protects it from drying and increases the gloss of the printed matter, and can enhance the appearance of the printed matter to a certain extent.
        The form of glazing machine is divided into three types: printing machine online glazing unit, special glazing machine and printing machine structure. Among them, multi-color printing machine online glazing unit, the structure has four-color, five-color, six-color plus one-color or two-color glazing unit, both water-based or partial UV glazing, oil- and solvent-based The glazing; high-brightness coatings and matt (matte) coatings, as well as drying equipment, high production efficiency and stable quality, greatly demonstrating the good production advantages of multi-color printing presses. Improve the market competitiveness of color prints. The ordinary glazing machine has simple structure, convenient operation and low equipment investment. It is a commonly used glazing equipment for packaging and printing. The product has wide adaptability and is suitable for large, medium and small printing and carton factories. The special glazing machine is divided into two types: manual paper feeding and automatic paper feeding. Some equipments can be used for glazing or partial glazing. It is necessary to make reasonable selection according to the actual production conditions of the factory to improve production efficiency.

          The glazing process of the glazing machine is to coat (or spray, print) a layer of uncoated transparent coating on the surface of the printed matter. After leveling, drying and calendering, a thin and uniform transparent bright layer is formed on the surface of the printed matter. Techniques and methods. When the glazing process of the glazing machine is leveled on the surface of the printed product, the smoothness of the surface of the printed product is enhanced, the printed texture is thicker and fuller, the color is more vivid and bright, the gloss and artistic effect of the printed matter are enhanced, and the printed product is enhanced. The appearance effect; the surface performance of the printed product is improved, and the function of protecting the graphic is improved; the grade of the product can be improved, and the added value is added.
          The glazing process of the glazing machine includes coating and calendering of the glazing coating. The process of coating glazing is actually a process in which a coating (commonly known as varnish) is applied to the surface of a paper print to be flat and dry. The coating calendering is a process of applying a calendering paint on the surface of a paper print by an ordinary glazing machine, and then drying it to a calender by means of a stainless steel strip, and then peeling off after cooling.
          The glazing process classification method of the glazing machine: according to the glazing coating, it can be divided into oxidative polymerization type coating glazing, solvent volatilization type coating glazing, photocuring type coating glazing and heat curing type coating glazing; Whole surface light, partial glazing, extinction and artistic glazing; the equipment used for glazing can be divided into: glazing on a separate glazing machine, glazing with a printing unit and a printing machine; The method can be divided into: spray coating glazing, printing coating glazing and special glazing coating glazing; according to the printing input mode, it can be divided into manual paper feeding and automatic paper feeding.