What are the common printing methods of self-adhesive coated paper?

The common printing methods of self-adhesive coated paper mainly include the following:

1. Lithography

Principle: Lithography, also known as offset printing, is an indirect printing method. In the printing process, graphic information is engraved on the flat printing plate, and then through the way of coating ink, using the principle of water and oil insolubility, the pattern is transferred to the surface of the material to form a printed matter.

Features: printing speed, low cost, and high color reproduction, suitable for monochrome and multi-color printing. The surface of self-adhesive coated paper is smooth, which is very suitable for lithography and can show high quality printing effect.

2. Relief printing

Principle: Relief printing is to thicken and raise the graphic information on the printing plate, so that it forms a height difference with the part outside the plate. When printing, the graphic information on the relief plate shall prevail, and the printing ink shall be pressurized to transfer the pattern to the surface of the material to form a printed matter.

Features: large printing thickness, strong color, suitable for products requiring high visual effects. Self-adhesive coated paper can be produced by letterpress printing with strong three-dimensional sense and bright color labels.

3. Screen printing

Principle: screen printing adopts mesh as printing material, and the ink is transferred to the surface of the material through the mesh by brushing and rotating the drum, etc., to form a printed matter.

Features: Screen printing is suitable for printing a small amount of labels, and a wide range of applications, can print a variety of complex graphics and text. Self-adhesive coated paper can achieve fine pattern and text printing through screen printing.

4. Other auxiliary processes

Laminating process: widely used in label production, transparent plastic film is pasted to the surface of printed matter through hot pressing, protecting self-adhesive, increasing luster and extending service life.

Hot stamping/hot silver process: Using the principle of hot pressing transfer, the aluminum layer in the electrochemical aluminum is transferred to the surface of the substrate to form a special metal effect, which is used to increase the surface decoration of the self-adhesive label and improve the added value of the product.

Die-cutting process: It is used more in special-shaped self-adhesive, and die-cutting is carried out by die-cutting knife plate, so that the shape of the print is no longer limited to straight edge or right Angle, and help the product forming.

In summary, the common printing methods of self-adhesive coated paper include lithography, letterpress printing and screen printing, etc., and can also improve the quality and beauty of the label through auxiliary processes such as film coating, gold stamping/silver stamping, die-cutting and so on. These printing methods have their own characteristics and are suitable for different application scenarios and needs.