What is gravure printing and its classification？

Gravure printing is to fill the entire surface of the printing plate with ink, and then use a special scraping mechanism to remove the ink in the blank part, so that the ink only remains in the cells of the graphic part, and then under greater pressure , Transfer the ink to the surface of the substrate to obtain printed matter.

Gravure printing belongs to direct printing.

The types of gravure printing are divided into two categories according to the plate-making method: engraving gravure and etching gravure.

Engraving intaglio

Engraving intaglio is to directly engrave the image and text corresponding to the original text on the surface of the plate cylinder with a cutter.

According to the control method of the carving knife, the pits can be divided into manual engraving intaglio, mechanical engraving and electronic engraving.

(1) Hand-carved intaglio

(2) Mechanical engraving intaglio

(3) Electronic engraving intaglio

The corroded intaglio is made by etching ink pits on the surface of the printing plate cylinder by chemical etching according to the original graphics and text. According to the different methods of manuscript image and text conversion, the corrosion intaglio can be divided into etching intaglio, photo intaglio and dot intaglio.

(1) The etching intaglio is made by a plate-making method that combines engraving and etching. That is, the shape of the original image and text is first hand-carved, and then the intaglio is made by the etching method.

(2) Photogravure is widely used, and it is the most widely used printing plate in gravure printing, mainly used for printing picture plates.

(3) Dot gravure is mainly used for packaging and decoration printing and building materials printing, etc.

In addition to books, newspapers and newspapers, gravure printing mainly prints packaging and decoration materials. According to the characteristics of gravure printing, the printed matter should meet the following quality requirements.

Monochrome gravure prints, bright, medium and dark tones are distinct, coordinated and delicate. The outlets are clear and complete. The layout is even and tidy.

Color intaglio prints: the image is bright, medium and dark tones with distinct levels, coordination and fineness. The color is natural and coordinated. The outlets are clear, complete, and the angle is accurate. The image outline is clear, and the overprinting tolerance is allowed.

Appearance of printed matter: The layout is clean, uniform, without obvious stains. The position of the image and text is accurate. The color of the printing plate is basically the same, the size error of fine prints is not more than 0.5mm, the general prints are not more than 1.0mm, and the overprint error of the front and back sides is not more than 1.0mm.