Common paper packaging printing process

When you walk into a shopping mall, the first thing that catches your eye is the dazzling array of exquisitely packaged goods. With the advancement of technology, there are many paper packaging printing processes today. According to statistics, there are five common paper packaging printing processes, as follows:

① Hot stamping process: The hot stamping process is to make the required hot stamping or hot silver pattern into a convex plate and heat it, and then place the required color of aluminum foil on the printed material, and after pressurization, make the aluminum foil adhere to the printed material.

② Laminating process: Laminating process is a surface processing process after printing, which refers to a product processing technology formed by covering the surface of the printed product with a layer of transparent plastic film using a laminating machine. Any printed product with a slight raised mark on the back of the paper, neat lines or dots at the edges, and light ink in the center is a relief print.

③ Concave and convex embossing process: This process uses the greater pressure of the relief printing machine to roll the local pattern or text on the printed semi-finished product into a concave and convex, three-dimensional image. The embossing process is mostly used for post-processing of printed materials and paper containers. In addition to packaging cartons, it is also used in the printing of bottle labels, trademarks, book binding, calendars, greeting cards and other products.

④ Gravure printing: In contrast to relief printing, the image part of the printing plate is lower than the non-image part, forming a groove shape. The ink is only covered in the groove, and there is no ink on the surface of the printing plate. The paper is covered on the upper part of the printing plate. The printing plate and paper are pressurized to transfer the ink from the concave part of the printing plate to the paper. The printed products of gravure printing have thick ink layers and bright colors, and the printing plate has the advantages of high printing durability, stable printing quality, and fast printing speed, so it has been widely used in practice.

⑤ UV imitation metal etching printing process: UV imitation metal etching printing, also known as frosted or sand surface printing, is to print a layer of uneven translucent ink on a substrate with a metallic mirror luster (such as gold and silver cardboard), and then cure it with ultraviolet light (UV) to produce an effect similar to that of a bright metal surface after etching or frosting. UV metal-like etching ink can produce velvet and matte effects, making printed products appear soft and solemn, elegant and luxurious.

In addition to the printing processes introduced above, paper packaging printing processes also include refraction, die-cutting indentation, water thermal transfer, drip molding, ice flower, scratch silver and other printing processes.