Post-press processing technology refers to the processing of printed products after they are completed. Surface processing is to improve the aesthetics and quality of packaging, mainly including film covering, and the main processes include embossing, die-cutting and indentation.
1. Lamination
Lamination is a transparent plastic film that is applied to the surface of printed matter through hot pressing to make it smoother and brighter, and the color of the graphic is more vivid. It is also waterproof and anti-fouling. It can be divided into two parts: surface processing and molding processing. Waxing and other processing techniques; molding processing techniques. The coating can make the surface of the printed matter wear-resistant, fold-resistant, and chemically resistant. However, since the plastic film is not degradable, it is difficult to recycle and easily cause pollution. Therefore, the plastic lamination process should be used with caution when glazing can be replaced.
2. Hot stamping
Hot stamping, also known as hot stamping, is to make the pattern or text that needs to be hot stamped into a convex plate, and with the help of certain pressure and temperature, various aluminum foils are printed on the substrate, showing a strong metallic light. , so that the product has a high-grade texture. At the same time, because aluminum foil has excellent physical and chemical properties, it can protect printed matter. Therefore, the hot stamping process is widely used in modern packaging printing.
3. Polishing and waxing
Polishing is to apply or spray a layer of colorless transparent paint on the surface of the printed matter to enhance the gloss of the product, and to play a waterproof and oil-proof role on the surface of the package. The product has bright luster and plays a good barrier role. To make it into a glossy film, to increase the printing wax is to apply hot melt wax to the wrapping paper.
4. Embossing
Embossing is a special technique for decorating the surface of printed matter. It uses a concave-convex mold to plastically deform the substrate of the printed matter under a certain pressure, and then performs artistic processing on the surface of the printed matter. The embossed various embossed graphics and patterns show different shades of patterns, with a clear sense of relief, which increases the three-dimensional sense and artistic appeal of the printed matter.
5. Die-cut indentation
Die-cutting indentation is also called press-cutting, buckle knife and so on. When the packaging and printing carton needs to be cut into a certain shape, it can be done by die-cutting and creasing process. Die-cutting is a process in which steel blades are arranged into molds (or carved into molds with steel plates), frames, etc., and paper is rolled and cut into a certain shape on a die-cutting machine. The hollow part of the main display surface in the middle is obtained by die-cutting technology and becomes Personalized decorations throughout the package. Indentation is the use of steel wires to emboss marks on the paper or leave grooves for bending.
6. Bronzing
There are many kinds of gold, silver, laser gold, bronze gold, etc. Generally, it is hot stamped or silver after the glue is passed; the film must have alignment lines; the hot stamping effect is various, but it is also classified according to the base material of the hot stamping, divided into hot stamping paper, hot stamping Flannel hot plastic and so on.
7. Partial UV process
It is a silk screen printing process, which enhances the colorful effect of printed products by partially coating UV varnish on the surface of the carton.
8. Freezing point snowflake
The freezing point snowflake effect is a kind of fine sandy feeling and hand feeling formed on the surface of the printed product after ink silk screen printing on gold cardboard, silver cardboard, laser cardboard, PVC and other substrates is wrinkled by ultraviolet light and cured by UV light. Delicate effect. Because it presents a thin layer of snow or ice-like effect on the surface of the printed matter, it is commonly called "snowflake" (larger pattern) or "freezing point" (smaller pattern) in the industry. Visually, this process has the characteristics of fine patterns, strong three-dimensional sense, luxury and elegance, so it is widely used in tobacco and wine boxes, calendars, gift box packaging or other exquisite printed products.
9. Reverse frosting
The reverse frosting process is a new type of printing process that has appeared in the past one or two years. It needs several special primers or varnish treatments to complete; A new craft of light. This process is to print the printed matter according to the normal color sequence, on the basis of the complete drying or curing of the ink, use offset printing in-line (or off-line) to print a layer of special primer on the local area that does not need to highlight the high brightness, After the primer is completely dry, apply UV varnish on the entire surface of the printed matter in a full-page manner. In this way, a cohesive reaction occurs in the area where the UV varnish and the primer are in contact, forming a small granular ink film to form a matte or matte surface; while a high-gloss mirror surface is formed in the UV varnish area where the primer is not printed. Finally, the surface of the printed product forms a local high gloss and a local matte low gloss area. Two completely different gloss effects achieve high-contrast effects of partial images, embellishing and highlighting graphics with glossy mirror surfaces.
10. Embossed bronzing
This process shows a hot stamping method with a stronger sense of metal and three-dimensionality through the change of the hot stamping plate. Through the concave-convex changes of the embossed pattern, the text presents a metal relief-like texture, making the bronzing text jump out of the plane, bringing a stronger visual impact.
11. Laser transfer
It has a dazzling visual effect and can effectively improve the grade of packaging. This process can print full-page or partial transparent laser effects on ordinary paper with a smooth surface, changing the past that only laser paper can be used for printing, or on paper. The surface compounded with proprietary laser film can show the processing method of laser effect, and can achieve flexible and changeable laser patterns.
12. Photoresist paper
A kind of paper material with very high technical content, which combines partial embossing, holographic laser anti-counterfeiting, vacuum aluminizing, paper-plastic composite cutting, set printing and many other advanced technologies, which has changed the previous situation of single laser pattern effect, and the paper is gorgeous and dazzling The unique visual effect and unique anti-counterfeiting function make it impossible to copy and plagiarize, and it is also convenient for consumers to intuitively identify the authenticity.
