Gravure printing is a direct printing method, it will directly imprint ink contained in the gravure pits to the substrate, the printed picture level bias is determined by the size and depth of the pit, if the pits is deep, the ink containing more ink layer, leaving imprinted substrate is thick;

On the contrary, if the pit is shallow, then the amount of ink contains less, after printing, the ink left on the substrate is thinner. An intaglio printing plate is made up of a concave and a surface of a printing plate corresponding to the original text.

When printing, the ink is filled into the pit, and the ink on the surface of the printing plate is scraped with an scraping knife, and the printing plate and the substrate are subjected to certain pressure contact, and the ink in the pit is transferred to the substrate to complete printing.

First, the characteristics of gravure printing

The ink carrier in intaglio printing is a dent which is engraved on the printing plate. The shape of the pit is exactly the same as the original picture. There is no ink on the surface of the printing plate. When the printing plate and substrate printing contact, the pit of the ink is transferred to the substrate surface, complete the printing process. Therefore, gravure printing has some unique features different from other printing methods, which are discussed below.

One Anti-counterfeit features

According to the original graphic engraving gravure printing ink pits, and ink level shade and the thickness of the lines can be controlled arbitrarily in the block, is not easy to be copied and forged, especially the ink depth of the pit, in accordance with the printed text of the very small possibility of lifelike carving. Therefore, the current banknotes, stamps, stocks and other securities are generally used intaglio printing, with better security effects. At present, some enterprises have even adopted the intaglio printing in the trademark and even the packaging and decoration, which shows that gravure printing is a more vigorous method of anti-counterfeit printing.

Two Wide scope of application

Ordinary soft materials can be used as substrates for gravure printing. Such as plastics, paper, aluminum foil and so on, especially for some easy to extend deformation of materials, such as textile materials, etc., have better adaptability, this is relief printing and peace edition can not match.

Three High quality printing

Gravure printing with large amount of ink, graphics and text with a convex sense, and rich in layers, clear lines, high quality. The printing of books, pictorial magazines, packaging and decoration is mostly intaglio.

Four Suitable for mass printing

Gravure printing has a longer cycle time, more waste and higher cost. But the printing plate is durable, so it is suitable for printing in large quantities. The bigger the batch, the higher the benefit, and the less benefit for the smaller batch printing. Therefore, gravure method is not suitable for printing smaller quantities of trademarks.

Two. Types of gravure printing

The types of intaglio printing are divided into two kinds according to the method of plate making: engraving intaglio plate and etching intaglio plate.

1. Engraving intaglio plate

Intaglio is graver directly on the surface of the plate cylinder engraved with the original graphics corresponding to the pit, according to some control methods can be divided into hand engraving, carving gravure gravure and electronic engraving machine.

(1) hand engraved intaglio plate

Handcrafted gravure technicians use a knife on the plate cylinder surface according to the original text of hand carved made of copper or steel plate materials available. Manual labor heavy, seihan costs large, long cycle. However, the intaglio lines carved by hand are distinct, and the printed material has a strong sense of hierarchy and is hard to forge. A printing plate used mostly for making securities and high-quality art.

(2) mechanical engraving intaglio plate

Mechanical engraving gravure is mechanical control graver in the surface of the plate cylinder of the carving, it will reduce the heavy work of hand engraving, plate speed, short cycle, low cost of plate making. A printing plate used primarily in making securities.

As the above two kinds of engraving plate making higher cost, seihan cycle is long, so the use of the range is limited. But everything is divided into two parts. In terms of anti-counterfeit packaging, hand engraving may be the best method of plate making. Because the secret security is one of the main methods of anti-counterfeiting packaging, technical personnel can use various methods to carve out some markings in the manual engraving gravure process in these handcrafted gravure the markings can not easily be found in print. It is more difficult to be distinguished, which formed a secret security.

(3) electronic engraving intaglio

This version is controlled by an electronic control device for knife carved on the surface of the plate cylinder. Using electronic engraving machine, according to the photoelectric principle, control engraving knife, in the roller surface carved out of the net hole, its area and depth simultaneously change.

2 .corrosion intaglio plate

The etching plate is made by etching the ink on the surface of the plate cylinder in a chemical way according to the original picture and text. The etching intaglio can be divided into etching intaglio plate, gravure plate and dot gravure according to the different conversion methods of the original text.

An etching plate is made by engraving and etching together. First, the shape of the original picture and text is carved by hand, and then the intaglio is made by etching.

Gravure printing is widely used, the most widely used in gravure printing, mainly used for printing painting etc..

Dot gravure is mainly used for packaging, decoration, printing and building materials printing.

Three. Application of gravure printing technology in anti-counterfeit packaging

1, hand engraving intaglio printing security effect is better

The secret anti-counterfeiting is one of the main aspects of the anti-counterfeiting of goods, and this is implemented by the trademark. The manual engraving and intaglio printing provide the necessary means for it. Hand carved intaglio printing plate in the easy implementation of secret security, engraving pits shades decide gradation printing graphics and text, the imitator can easily copy the size and the thickness of the lines of text, but it is difficult to copy the same gradation (i.e. ink deep pit) printing. This is the main reason why long - term securities have to be used in intaglio printing.

Run the less, the better security. Because of the long period of handcrafted gravure, high cost, so the little amount when printing price higher. The main purpose of counterfeiters is to pursue economic interests. They are unwilling to take any risks when they are unprofitable or have little benefit. Therefore, it is possible to say that a small number of trade marks are made by intaglio printing, and that the effect of anti-counterfeiting may be better than that of large quantities of intaglio printing.

2, plate making and printing are carried out in two places

Different plate making and printing have better anti-counterfeiting effect. Printing plate has the ability, but the use of the trademark enterprise plate work should be elected units, because of a secret key security is to know people better, even if they know is know in part, but can not let it know the trademark design and production of the whole process, so that even in a link a loophole, the other links can meet the security needs to. When printing trademarks in printing factories, enterprises should send responsible personnel to supervise printing on the spot to prevent the printing plates from being stolen and the trademarks stolen. After printing, the printing plate should be recovered and kept well.

3, combined with anti-counterfeiting ink technology

Ink anti-counterfeiting technology is also one aspect of the secret anti-counterfeiting, the gravure printing technology and ink anti-counterfeiting technology combined to achieve double secret anti-counterfeiting, security effects will be better.

Some printing inks of pigment particles is large, need a thick layer of gravure printing ink layer, and a thick printing texture strong, the combination of the two will get double anti-counterfeiting and decoration effect.

If the gravure printing using fluorescent ink, not only to ensure the gravure printing of a slight convex, but also to ensure the use of fluorescent ink requirements, both the secret, anti-counterfeiting function has been guaranteed.

Ink should be deployed, and then to the printing enterprise use, printing finished, should be ink back to save, so that can get better security effect.