paperback book printing Printing Type: Offset Printing Book Cover: Softcvover Cover Book Style: Softcvover Cover Book Printing Trademark: OEM HS Code: 4901990000 Paper Type: Special paper for the cover; Art Paper for inner pages Surface Finish: Gold Hot Stamping Binding: Sewing Binding Book Content: History of University Origin: Shenzhen ChinaSend InquiryChat Now
paperback book printing
Printing Type: Offset Printing
Book Cover: Softcvover Cover
Book Style: Softcvover Cover Book Printing
HS Code: 4901990000
Paper Type: Special paper for the cover; Art Paper for inner pages
Surface Finish: Gold Hot Stamping
Binding: Sewing Binding
Book Content: History of University
Origin: Shenzhen China
Tips of printing:
Partial UV glazing process for postpress process
According to the needs of product glazing, local glazing coating is applied to the parts that need to be prominent in the trademark and packaging printed matter. Compared with the surrounding patterns, the glazing pattern is bright, bright and strong, and can produce unique artistic effects. Therefore, it is very popular among Chinese and foreign merchants.
Partial UV glazing is a kind of finishing technique for printed matter. It is named for its selective glazing of printed graphics with UV varnish with high brightness, transparency and abrasion resistance. While highlighting the theme of the layout, it also enhances the surface finish of the print. Partial UV is mainly used in the finishing of book covers and packaging products to achieve the purpose of making the prints icing on the cake.
At present, the common local UV effects are: partial bright light, local extinction, local frosting, partial colorful partial refraction, partial wrinkles and local ice flowers.
The local UV can be applied either after the film is applied or directly on the printed matter, but in order to highlight the effect of partial glazing. Generally, it is carried out after the film is covered by the film, and most of the matt film is covered, accounting for about 80% of the local UV glazing product. The biggest difference between partial glazing and full-page glazing is that one needs to make a printing plate, which is a certain registration requirement for glazing equipment. There are three main elements of local UV glazing, namely glazing, equipment registration and curing equipment. In order to ensure that the local UV glazing area is consistent with the size of the printed graphic, the photographic imaging method should be used when making the glazing plate.
1. Screen printing partial glazing
Screen printing has the characteristics of high ink transferability, thick ink layer and strong three-dimensional effect. For the glazing screen, it is generally preferred to use a 200-300 mesh screen (for partial glazing effects such as partial frosting, the number of meshes is lower), and the tension of the stretcher is 20 to 25 N/cm. Due to the small investment in equipment. Many books and packaging factories prefer screen printing when adding local glazing services. Some professional printing glazing companies improve glazing precision and increase production efficiency. A fully automatic roller screen printer is already in use. Production speed can reach 3,000 sheets / hour. However, the local glazing of screen printing basically adopts the offline production mode. There are fewer applications for online rotary screen printing units.
2, flexographic partial glazing
Flexographic printing is characterized by the ability to form thicker coatings in a simpler process. Therefore, it is highly sought after in UV glazing. Partial glazing of flexographic printing is divided into ordinary flexographic printing glazing and special flexographic printing glazing, and some simple graphic still uses engraved rubber relief. Partial glazing for flexographic printing is suitable for off-line glazing as well as on-line glazing. The flexographic printing glazing method, combined with the anilox roller and the cavity scraper, can accurately control the amount of varnish and the glazing quality is stable.
3, gravure partial glazing
Gravure printing is also advantageous in local uV glazing due to the thicker printing ink layer and the high printing durability of the concave cylinder. In particular, the appearance of the sheet-fed gravure printing machine has contributed to the development of gravure partial glazing. However, due to its high cost of plate making, it is mainly used for long-running glazing business.
4, other local glazing methods
No one would use offset printing for glazing until there was no UV varnish because its printing ink layer was too thin. UV varnish has some advantages due to its thick film layer, high gloss and high precision of overprinting. It is also used in local UV glazing but mainly used for on-line glazing.
From the production method, the local UV glazing machine can also be divided into offline glazing and online glazing. Off-line glazing refers to printing, and glazing is performed on a dedicated device, which requires the use of a dedicated glazing machine or calender. When glazing is performed offline, since the printed matter can be sufficiently dried, a higher gloss than that of the online glazing can be obtained. In addition, offline glazing production flexibility. Equipment investment is small. On-line glazing refers to the printing and glazing finish on a production line that adds glazing and UV curing to the press. The print is directly glazed after printing is completed.
Local UV new technology
1, mixed ink technology
Since UV printing or UV glazing is not suitable for application on the surface of a highly absorbent substrate, and the adhesion of the surface of the printing ink is not good, most of the in-line UV glazing is required. If all printing with UV ink is inevitable, the cost will increase. : If printing with ordinary ink, lamination or full glazing before glazing, this will undoubtedly hinder the application of offset glazing. The hybrid ink technology effectively solves this bottleneck problem. It combines the advantages of UV inks and conventional inks in terms of performance, namely the advantages of photocuring and oxidative polymerization drying, which improves the synergistic effect of the ink surface and UV varnish, paving the way for offset glazing.
2, reverse upward light
Pro-Cure is relative to traditional partial glazing. The traditional glazing method (flexographic printing screen printing or gravure printing) is used for partial glazing. Finally, partial glazing printing must be used to achieve high contrast effect of local graphics, so the overprinting precision of glazing and printing becomes glazing. The key to the process. The reverse-light process breaks through the above laws, which makes the registration problem easy to solve.
3, online UV glazing
On-line glazing is not a new technology for flexographic printing and gravure printing, but for applications with a wider application range and higher printing accuracy and speed, it is launched under the call of differentiation and value-added services. The glazing technology with innovative ideas. There are four main forms of on-line UV glazing that have been applied: ordinary ink + double glazing (aqueous glazing + UV glazing); mixed ink + UV glazing; UV ink + UV glazing; UV ink + OP oil + UV glazing (reverse light).