The characteristics of printing glazing and the main factors affecting the quality of packaging glazing
We are a big printing company in Shenzhen China . We offer all book publications, hardcover book printing, papercover book printing, hardcover notebook, sprial book printing, saddle stiching book printing, booklet printing,packaging box, calendars, all kinds of PVC, product brochures, notes, Children's book, stickers, all kinds of special paper color printing products, game cardand so on.
For more information please visit
http://www.joyful-printing.com. ENG only
http://www.joyful-printing.net
http://www.joyful-printing.org
email: 860681365@qq.com
Glazing is to apply a layer of colorless and transparent paint on the printed surface of the printed matter. Shenzhen Printing Company obtains a bright film layer. When glazing, due to the leveling of the paint on the surface of the printed product, the smoothness of the surface of the printed product is enhanced, which not only improves the surface gloss of the printed matter, but also improves the surface properties of the printed matter, enhances the light resistance of the ink, and increases the heat resistance of the ink layer. The moisture-proof ability plays a role in protecting printed graphics and beautifying products. It has been widely used in the surface processing of book cover processing and packaging decoration, albums, large decorations, posters and other printed materials.
There are many methods for glazing. According to the glazing coating, Shenzhen Printing Company can be divided into oxidative polymerization coating glazing, solvent evaporation coating glazing, thermosetting coating glazing, and photocuring coating glazing. According to the glazing coating method, it can be divided into spray coating glazing, printing coating glazing and special glazing coating glazing. If you press the glazing device, you can divide it into a glazing machine and a printing splicer. In addition, the product after glazing can be divided into whole surface light, partial glazing, extinction, and artistic glazing.
Regardless of the technical method and material glazing, excellent glazing quality is required to achieve the intended purpose. From the material point of view, the factors affecting the quality of glazing mainly include good glazing adaptability between printing paper, printing ink and glazing coating.
(1) Printing paper. The most influential effect of printing paper on glazing coating is the smoothness and surface absorbency of the paper, which affects the leveling of the coating and affects the coating to form a highly smooth bright film on the surface of the printing. Shenzhen Printing Company has a high smoothness of the paper, the surface of the paper is in good contact with the coating layer, and the coating is easy to level, thereby forming a highly smooth film surface. The surface of the paper is highly absorbent. When the paint is leveled, the paper fibers absorb the paint too quickly, making the paint fluid poor and difficult to level. On the contrary, the surface of the paper is weakly absorbed, the paper fiber absorbs the paint too slowly, the coating in the leveling is not easy to form a film, and it is difficult to form a high-smooth bright film. Therefore, different papers should be selected to match the coating, and the process conditions such as glazing coating leveling time and drying temperature should be adjusted.
(2) Printing ink. The particle size of the ink affects the wetting of the ink layer and thus affects the leveling and brightness of the coating. If the ink particles are large, the surface of the printed product must be rough, not easy to wet, and difficult to level.
(3) glazing coating. Glazing coating is also the main factor affecting the quality of glazing. Shenzhen printing company glazing coatings must not only have colorless, odorless, non-toxic, strong gloss, chemical resistance, fast drying, etc., but also good transparency and discoloration. It has good flexibility, heat resistance, leveling and adhesion. The most important effect of varnish on the quality of glazing is its viscosity, followed by surface tension and solvent volatility. The solvent in the coating will be less and less due to volatilization, penetration, diffusion, etc., and the viscosity will gradually increase. The power generated by the leveling is the surface tension of the coating, and the surface tension flattens the surface with traces into a smooth surface as much as possible to shrink the coating into the smallest shape of the surface. Therefore, the surface tension of the coating has a large influence on the leveling.