南京維嘉標(biāo)簽印刷有限公司
Nanjing Weijia Label Printing Co., Ltd
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Introduction of stamping process of adhesive label
According to the processing method of self-adhesive label, the stamping method is divided into sheet fed stamping and web stamping. Sheet fed stamping and traditional stamping process is the same, in the special stamping machine processing. Web stamping is completed on the label linkage machine, which is the most widely used processing method. Net brings you the following ways of drum material stamping:
Longyuan cold pressed gold film on the net
Flat stamping on label machine
Whether it is flat press or circular press flat type equipment, due to the web intermittent feeding, so the stamping all adopts flat press square type. In general, the stamping station is an independent unit, there are also some models of stamping to die-cutting share a unit, separate use.
Multi position flat stamping
Some models have two station stamping unit, such as the smhc-45-mwl label machine of Shiki, Japan. One unit is close to the printing plate to complete the horizontal stamping, and the other unit is an independent unit to complete the vertical stamping. This machine can be used for two-color bronzing at the same time.
Flat pressing and gilding on processing machine
The processing machine is specially designed for processing and printing the drum label and label without printing. Stamping is a function of the processing machine. The stamping device on the processing machine generally adopts the flat pressing square type, and its working principle is the same as the above label machine.
Rotary machine on the round hot stamping
The bronzing plate used in the rotary hot stamping is in the shape of a roller, which is in contact with the embossing roller to realize the bronzing. Circular stamping is suitable for continuous paper feeding wheel transformation label machine, but there are certain requirements for paper feeding speed, that is to say, it has an impact on the printing speed. But relative to the flat stamping, greatly improve the efficiency. The manufacturing cost of the roll is relatively high, so it is only suitable for long version live stamping.
Cold stamping on rotary machine
This is a new hot stamping process, no longer using the heated metal plate, but using the printing adhesive method to transfer the metal foil and realize hot stamping. The technological process is as follows: the UV pressure sensitive adhesive is printed on the position where the printed matter needs to be bronzed, and the adhesive is dried by the UV drying device, then the special metal foil is compounded with the pressure sensitive adhesive, and then the metal foil is peeled off, so the part of the metal foil that needs to be transferred is transferred to the surface of the printed matter to realize cold bronzing. Cold stamping process has the advantages of low cost, energy saving and high production efficiency. It can make use of the existing equipment parts without additional devices. It is a new process with great development prospects.
Gilding first and gilding later
The stamping of self-adhesive can be divided into the first stamping and the second stamping. The first stamping refers to the first stamping on the label machine, and then printing; Then gilding refers to printing first and then gilding last. The key to hot stamping is the drying of ink. There are two kinds of relations between gilding pattern and printing pattern: juxtaposition and overprint. Due to the use of different inks, label printing to be used first and after stamping two processes.
Pre gilding process
When the label machine installed in front of the intermittent paper feeding and gilding unit uses ordinary ink to print labels, the first gilding process is adopted. Because the ink used is oxidation polymerization drying type, it takes a certain time for the ink layer after printing to dry completely, so the gilding pattern must avoid the ink. The best way to avoid ink is to pre gild the web material before printing”
The first stamping process requires that the printed pattern and the stamping pattern are separated (side-by-side), because the surface of anodized aluminum is smooth, non inking, and cannot be printed. First bronzing can prevent the ink from rubbing dirty and ensure the quality of label printing.
Post gilding process
The post stamping process is applied to the label machine where the stamping parts are installed on the back door, and UV ink is used for printing. The drum material is printed first, and the ink is instantly dried by the UV drying device, and then the material surface or ink surface after the ink drying is bronzed. As the ink is dry, the gilding pattern and the printing pattern can be juxtaposed or overprinted, and the ink will not rub dirty.
Other related introduction
Traditional packaging often hides the products in the packaging, but modern designers are trying to overthrow this mode and show the products in the packaging. Whether it is to encourage tactile interaction, imitate the outline of the brand logo, or form recognizable or humorous shapes, create a window in the packaging to display the product in a meaningful or smart way, so that users can stay and notice. Invisible colorless fluorescent anti-counterfeiting ink, which is a mature technology, easy to use anti-counterfeiting ink. Usually, it is white or colorless, and does not show color when printed on paper or plastic film. Different varieties will show different colors under the banknote detector or ultraviolet light. It is suitable for the anti-counterfeiting packaging of official documents, securities, certificates and all kinds of high-grade cigarettes, wine, drugs, cosmetics and other famous brands.
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