1. Screen printing of anti-counterfeiting ink
Anti-counterfeiting inks suitable for screen printing features include thermal inks, photosensitive inks, magnetic inks, fluorescent inks, anti-tampering inks, etc. These inks have a certain anti-counterfeiting effect for anti-counterfeiting packaging.
1. Thermochromic ink
It means that the color will change under certain external heating conditions. It can be divided into two categories: one is plastic type, that is, the color of the ink can be restored to its original state after the heat source that changes the color is removed; the other is non-plastic type, that is, the ink color cannot be restored after the heat source is evacuated. According to the requirements of customers, special patterns or logos are produced and printed with thermochromic ink to the hidden place of the package, or any designated location. When verifying the authenticity of the product, use a heat source with a certain temperature, such as a lighter, a match, a cup poured into boiling water, a hot hair dryer, etc. for baking. The dark mark parts immediately produce obvious color changes, and hidden signs also appear one after another and can be quickly identified The authenticity of the product.
2. Photochromic ink
Photochromic inks can be divided into two categories: one is ordinary type, which means that under ordinary sunlight and strong light, the color of the ink changes, from deep to light or light to dark, colored to colorless, or no The color becomes colored. It will return to its original state when leaving the light source. The application of this ink on packaging can not only improve the quality of goods, increase the fun, and highlight the anti-counterfeiting effect. At the same time, when printing, you can use ordinary ink to print the words "false and invalid" and then cover it with photochromic ink to make it concealed. The other type is the UV type, which means that the ink is colorless or unchanged under the irradiation of ordinary light sources, but it will show bright red, orange, yellow-green and green fluorescence under ultraviolet irradiation. For example, our RMB is printed with this ink, and the authenticity can be displayed under the action of the money detector.
3. Magnetic ink
Magnetic ink was first used to print codes on credit cards. The magnetic card will be widely used due to its convenient portability and quick settlement. Magnetic ink is used for anti-counterfeiting packaging, which is mainly printed with magnetic ink on a certain part of the packaging, which can be detected by special means, thus forming a secret anti-counterfeiting.
4. Fluorescent ink
The printed products printed with fluorescent ink are bright in color and have a good decorative effect. Under the action of visible light and ultraviolet light, they can emit shining fluorescence. The fluorescent ink used for anti-counterfeiting packaging can be prepared by itself, and the anti-counterfeiting effect is the best. Different formulas can give different fluorescence effects. It is generally difficult to carry out realistic forgery, thus forming the anti-counterfeiting secret.
2. Screen printing anti-counterfeiting design
The success of anti-counterfeiting packaging and printing products first requires packaging designers to combine a variety of anti-counterfeiting means to carry out a comprehensive comprehensive design, so as to achieve a better and safer anti-counterfeiting effect.
1. Packaging anti-counterfeiting design
The current tobacco and wine packaging and printing all use screen printing methods, which can form ice flowers, refracting light, and three-dimensional effects. The essence is that special design methods are used in the electronic color separation of the original and the screen production. Effective. Packaging anti-counterfeiting can also be designed by means of microtext, concealed places for secret memory, etc., is the best way to secret anti-counterfeiting.
2. Anti-counterfeiting design for trademarks and bottle stickers
The anti-counterfeiting design of the trademark adopts the laser holographic iris of the product trademark to be directly imprinted on the printed matter, making the production of high-end luxurious laser holographic iris plate is a high-tech technology, and counterfeiting is not easy. Moreover, even with the technology and equipment, it is impossible to copy the same trademark with the original and color. The anti-counterfeiting design of bottle stickers is best to use disposable adhesive paper (fragile paper), so that it cannot be removed, and it is also the most popular instant sticker on screen printing.
3. Anti-counterfeit screen printing process
With the development of high technology and people's demand for high-quality packaging and printing products, the packaging industry has launched technological innovations in recent years. Multi-color offset printing machines, screen printing machines and other printing equipment are used together. The mutual penetration of various printing processes makes printed products more unpredictable and colorful.
1. Offset and screen printing combined printing
The design of high-end packaging and printing products includes large-area color blocks, continuous adjustment of multiple color sequences, and complicated lines and patterns, etc., and single printing brings certain difficulties. If you use offset printing, screen printing combined printing is the best. The characteristic of screen printing is that the ink color is thick and even. It is best to print a large area of ​​solid color blocks. The characteristic of printing with an offset press is flat pressure. It is most suitable for printing four-color screen tone and complex line parts. In this way, the advantages of avoiding weaknesses are obvious. For some demanding and complex prints, multi-process combination printing such as offset printing, letterpress printing and screen printing can also be used. In short, the more complicated the printing process and the more difficult the printing, the better the anti-counterfeiting effect.
2. Transition color printing
Transition color printing is also called cross-color printing. According to requirements, screen printing can be used to pour inks of various hues on the printing plate, and part of the ink is mixed under the action of a scraper and then printed on the substrate. It can print multiple colors at once, and the middle transition layer is soft, which can play a role in anti-counterfeiting. If this process is used on a large area of ​​shading, its anti-counterfeiting effect will be more prominent.
3. Special gloss security printing
Special gloss printing is a new and popular printing technology in the packaging and printing industry in recent years. Special gloss refers to the printed matter printed by this process, and its surface gloss effect is different from the gloss effect reflected by ordinary ink or printed paper. The printing process mainly includes: metallic gloss printing, pearlescent printing, refractive printing, fluorescent printing, variable gloss printing, laser holographic iris printing, crystal gloss printing, metal imitation etching printing and matt printing. The characteristics of these special gloss printing processes are that the printed packaging is colorful, brilliant, colorful, and unpredictable, which not only improves the product grade, increases the added value of the product, and enriches the diversity of packaging products, but also has certain specificities. And secret, so it also has a relatively safe anti-counterfeiting effect. At present, most of the above processes use screen printing processes.
4. Laser holographic iris printing
Laser holographic iris printing is the use of laser holography to make a template in an anti-shock room and transfer it to a certain carrier through a certain pressure. The product can produce a colorful and colorful unique effect and three-dimensional effect under a 45 ° light source. The extremely strong three-dimensional image is favored by consumers. At present, the cold press coating and hot stamping film are used to print directly. Its process is relatively complex, very difficult, and the anti-counterfeiting effect is excellent.
4. Anti-counterfeiting of printed paper
Watermark paper is preferred for anti-counterfeiting paper printing. Watermark paper is paper in the manufacturing process, using technical means to make the required logos, patterns, etc. in the paper. For example, a metal wire embedded in paper is called a security wire, which is not easy to see under normal circumstances, and can only be seen through the transmission of strong light. Most of the RMB in China is printed on watermark paper. At present, a special ink-waterproof marking ink is used in anti-counterfeiting printing, which is printed on ordinary coated paper. The watermark effect is wonderful, which is mainly used in wine packaging.
V. Anti-counterfeit printed substrate
With the rapid development of high technology, papermaking technology is also constantly developing. The produced material can reflect various colors of pearlescent paper, laser film paper, laser water-washed paper, water-washed silver dragon, water-washed silver silk and other special anti-counterfeiting paper under different light. These substrates are the best and most ideal anti-counterfeiting printing materials in our anti-counterfeiting printing. With the continuous development of the times and the progress of science and technology, we believe that high-tech processes such as anti-counterfeiting printing will definitely play an increasingly important role.
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