Little knowledge about printing processes and processes

Printing is a technique in which an original such as a character, a picture, or a photograph is transferred to a surface of a material such as paper, fabric, or leather by a process such as a plate making, ink application, or pressurization, and the original content is copied in batches. There are many forms of printing, the most common being traditional offset printing, screen printing, and digital printing.

  • The printing process

Printing is divided into three stages: Prepress → refers to the work in the early stage of printing, generally refers to photography, design, production, typesetting, output film proofing, etc.; Ink → refers to the mid-printing work, the process of printing the finished product through the printing machine; Post-press → refers to the post-printing work, generally refers to the post-processing of printed materials including glue (film), over UV, oil, beer, bronzing, embossing, decoration, binding, cutting, etc., mostly used for propaganda and packaging, printed matter.

Printing is a kind of copying technology for original graphics information. Its biggest feature is that it can reproduce the graphic information on the original in a large amount and economical way on various substrates. It can be said that the finished product can also be widely spread and permanently preserved, which is incomparable to other reproduction technologies such as movies, television, and photography. The production of printed matter generally involves five processes: selection or design of the original, original production, printing, printing, and post-press processing. That is to say, first select or design an original suitable for printing, and then process the graphics information of the original to produce an original for printing or engraving printing, and then use the original to make a printing plate for printing, and finally print Version installed on the press. The ink is applied to the surface of the printing plate by the inking system, and the ink is transferred from the printing plate to the substrate by pressure mechanical pressing. A large number of papers are processed by the printing, and the finished product is adapted for various purposes. Nowadays, people often refer to the design of originals, the processing of graphics information and the plate making as prepress processing, and the process of transferring the ink on the printing plates onto the substrates is called printing. The completion of a piece of printed matter requires pre-press processing, printing, and post-press processing.

  • The printing art
  1. Emboss printing

Embossing printing is the process of pressing the printed matter to make it similar to the original. The general production objects are oil paintings and the like. Because the oil painting has the thickness of the paint on the original painting, and the ordinary printed product can only express its plane, if the printed matter becomes the same convex as the original, the concave is concave, isn’t it more real? Emboss printing is divided into high-end products and popular products. Premium products are printed with excellent quality paper and are limited in quantity. Popular products are printed on plain paper and are popular for the general public, so they are more in production. After the printing is completed, a film is attached to the printed matter, and then the pre-made platen (i.e., the embossed plate obtained by photolithography) is pressed on the printed matter to make the same beauty as the original painting. Such relief prints are reproduced with the most famous paintings, and others are still used in art collections or landscape postcards, and the like.

  1. Hot stamping silver foil

A gold font or pattern is often seen on the cover of a book or on a wooden board or plastic surface, etc., is expressed by heating the pattern or text of the desired bronzing into a convex version, and then placing an aluminum foil of the desired color on the printed matter. Paper, after pressing, its aluminum foil falls onto the printed matter. This effect is superb, while the aluminum foil is attached to the printed matter and never fades.

  1. Magnetic printing

Most of the magnetic printing is used in the check of securities, so as not to suffer from counterfeiting. Magnetic printing is called MICR, which is Magneticlnk, an abbreviation for CharacterRecognition. The main printing use is to use numbers and symbols such as 0-9, and to print such numbers or symbols in the magnet powder mixed ink under the check. Since the electrical wave difference generated by the text is different, it constitutes discrimination in classification processing. Magnetic printing is widely used on checks, such as the United States, where there are 20 billion checks per year. In terms of working methods, it is divided into manual and mechanical.

  1. Bump embossing

The pressure is used to make the paper emboss, which is, of course, the feeling of using the elastic function of the paper. Both concave and convex models are necessary. The general method is to place the convex shape on the table and then heat it slightly. When the concave shape is pressed from top to bottom, the paper will have a concave-convex shape. In many cases, when the outer edge of the trademark or pattern must be embossed to form a concave-convex shape, the alignment line must be precisely placed on the four sides, otherwise, the shape and the printed portion cannot be completely matched.

  1. Floating printing (convex printing)

The printed matter on the plane is made into a three-dimensional convex shape, which is a method of floating out of the printing process, and has commercial value because it can be noble and generous. In particular, the wrapping paper, labels, and packaging boxes that give gifts can more clearly show the value of their products. The method is extremely simple, that is, after printing a common printed matter, using resin powder (for rosin powder currently used in Hong Kong) to be spread on the dry ink, the powder is melted in the ink, and then heated to make the printing. Part of the bulge came. The powder used for floating printing is brilliant, dull, gold, silver, fluorescent, and the like. Printing methods include letterpress printing and lithography. Generally, such printing machines are made by semi-manual production. It has been developed into a fully automated machine, that is, from printing to heat, using a consistent operation method, resulting in a rapid increase in production.

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