1. High transparency of the film layer and no discoloration
Decoration prints to obtain excellent glazing effect depends on the formation of a colorless transparent film on the surface of the printed sheet, and after drying the text does not change color. Moreover, it cannot be discolored or yellowed due to sun exposure or long use time.
2, the film layer has a certain wear resistance
Some glazed prints require certain wear resistance and scratch resistance after glazing. Because of the use of high-speed box making machine, cardboard box packaging machine device, book cover and other assembly line production process, the surface of the printed matter is subjected to friction, so it must have wear resistance.
3, with a certain flexibility
The bright film formed by any kind of glazing oil on the surface of the printed matter must maintain good elasticity to adapt to the flexibility of paper or cardboard, and will not be damaged or cracked and fall off.
4, the film has good environmental resistance
Some of the printed matter after glazing is used to make all kinds of packaging cartons, in order to be able to play a good protective effect on the packaged products, the environmental resistance of the glazing film layer must be better. For example, the packaging of food, cigarettes, cosmetics, clothing and other goods must have moisture-proof and mildew proof performance. In addition, the chemical properties of the dried film layer should be stable. The properties cannot be changed by contact with chemicals such as weak acids or bases in the environment.
5. It has a certain adhesive force on the surface of printed matter
Due to the influence of the integral density of the ink layer on the surface of the printed matter, the surface adhesive suitability is greatly reduced. In order to prevent the film layer from dry cracking and defilm in use after drying, it is required that the film layer has strong adhesive force, and has certain adhesive force for ink and various auxiliary materials used in ink mixing.
6, good leveling, smooth film surface
There are many kinds of printing materials, coupled with the influence of printed graphics, surface absorption, smoothness, wettability and so on are very different, in order to make the glazing coating on the surface of different products can form a smooth film layer, requiring good smoothing of the glazing oil, smooth film surface after film formation.
7. Wide post-press processing adaptability
After the printing is polished, it is generally required to undergo post-process processing, such as: molding processing, hot stamping electrochemical aluminum processing, etc. Therefore. The processing adaptability of the glazing film after printing is required to be wide. For example: good heat resistance, hot stamping electrochemical aluminum, can not produce bonding phenomenon; High solvent resistance, after drying the film layer, can not be affected by the adhesive in the post-processing and appear foaming, wrinkling and sticky phenomenon.
In general, the post-press polish is more and more recognized by everyone, the future development is very promising, but also more environmentally friendly.
