With the development of product economy, people's material living standards have also been continuously improved. The counterfeit and shoddy goods in the consumer market have gradually increased. Consumers are even more worried about tobacco, alcohol, beverages, pharmaceuticals, and food. Counterfeit packaging often makes it hard for people to prevent them. It not only brings economic losses to consumers and manufacturers, but also harms the health and lives of consumers. At the same time, it has brought bad influence to some brand-name products that have long enjoyed reputation. In the printing industry there is a special printing technology that is security printing.
First, security printing ink screen printing
The anti-counterfeiting inks suitable for screen printing features include thermal inks, photosensitive inks, magnetic inks, fluorescent inks, and anti-alteration inks. These inks have a certain anti-counterfeiting effect for anti-counterfeit 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 a plastic type, that is, once the heat source of discoloration is removed, the color of the ink can be restored to the original state; the other is non-plastic, that is, the ink color cannot be restored after the heat source is withdrawn. According to the customer's requirements, special patterns or logo plates are produced and printed with thermochromic inks to concealed parts of the package, or any designated location. When verifying the authenticity of the product, using a heat source with a certain temperature, such as lighters, matches, cups filled with boiling water, hot hair dryers, etc., baking, the marked parts immediately produce a clear color change, hidden signs also appear one after another, can be quickly identified The authenticity of the product.
2. Photochromic ink
Photochromic inks can be divided into two types: one is the common type, which refers to the color change of the ink under ordinary sunlight and intense light, from darker to lighter or darker, from colored to colorless, or no Color becomes colored. Leave the light source will be restored to the original state, this ink on the packaging application can not only improve product quality, increase the fun, highlight the anti-counterfeiting effect. At the same time, it can be printed on the shading with ordinary ink printing "fake invalid" and other words and then covered with photochromic ink to make it hidden. The other type, namely UV type, means that the ink is colorless or does not change under the illumination of an ordinary light source, but it will show bright red, orange, yellow-green and green fluorescence under ultraviolet irradiation. Like our renminbi, this type of ink is used for printing, and authenticity can be revealed under the effect of a bill validator.
3. Magnetic ink
Magnetic ink was first used to print codes on credit cards. Because the magnetic card has the characteristics of convenient carrying and quick settlement, it will be widely used. Magnetic ink is used for anti-counterfeiting packaging. It is mainly printed on a certain part of the package with magnetic ink and can be detected by special means to form a secret anti-counterfeit.
4. Fluorescent ink
The printing inks printed with the fluorescent ink are colorful and have a good decorative effect. Under the action of visible light and ultraviolet rays, they can produce glittering fluorescence. Anti-counterfeiting packaging fluorescent ink can be deployed, the best anti-counterfeiting effect. Different formulations can give different fluorescence effects. It is generally difficult to make realistic counterfeiting, thus forming a security secret.
Second, screen printing security design
The success of anti-counterfeit packaging and printing products requires packaging designers to combine various anti-counterfeiting measures to carry out a comprehensive design in an all-round way, so as to achieve a better and safer anti-counterfeiting effect.
1. Packaging security design
Now cigarette and wine packaging printing adopt screen printing method, which can form ice flower, refraction, and three-dimensional effect. The essence is in the original electronic color separation film and the screen design adopts a special design method. The use of security printing is Effective. Anti-counterfeit packaging can also use microtext, concealed place for the design of secrets and other means, is the best way to memorize the anti-counterfeiting.
2. Anti-counterfeiting design of trademarks and bottles
Trademark anti-counterfeiting designs use the laser holographic iris made of the product trademark directly imprinted on the printed material, making it luxurious and luxurious.
The production of laser holographic iris is a profound technology and counterfeiting is not easy. Furthermore, it is impossible to duplicate the same trademark and original color with technology and equipment. The anti-counterfeiting design of bottle stickers is best to use disposable adhesive paper (easily shredded paper), making it impossible to expose, and it is now the most popular instant sticker of screen printing.
Third, anti-counterfeit screen printing process
With the development of high technology and people's demand for high-quality packaging products, the packaging industry has carried out technological innovation in recent years. Multi-color offset printing machines, screen printing machines and other printing equipment used in combination with each other. The mutual penetration of various printing processes makes the printing products more varied and colorful.
1. Offset, screen printing combination printing
The design of high-grade packaging prints has a large area of ​​color blocks, continuous multi-color sequence and complex lines, patterns, etc., single printing brings a certain degree of difficulty. If you use offset printing, screen printing, it is best. Screen printing is characterized by thick and uniform ink, and it is best to print large-area solid color patches. The feature of offset printing is pressure flatness, which is most suitable for printing four-color meshes to reconcile complicated lines. This is an obvious way to avoid weaknesses. For some demanding and complex prints, offset printing, embossing, screen printing, and other multi-process printing can also be used. In short, the more complex the printing process, the greater the difficulty of printing and the better the anti-counterfeiting effect.
2. Transition color printing
Transition color printing is also called cross-color printing. Screen printing can be used to pour a variety of hue inks onto the printing plate according to the requirements. After the scraper is used, some inks are mixed and then printed on the substrate. It can be printed on a variety of colors at once, and the intermediate transition layer is soft, which can play a security role. If such a process is applied to large-area shading, its anti-counterfeiting effect will be more prominent.
3. Special gloss security printing
Special glossy printing is a new type of printing technology that has become more popular in the packaging printing industry in recent years. Special gloss refers to the printed products printed by this process, and the surface gloss effect is different from the gloss effect reflected by ordinary ink or printing paper. The printing processes mainly include: metallic luster printing, pearlescent printing, dioptric printing, fluorescent printing, variable gloss printing, laser holographic iris printing, crystal luster printing, imitation metal etching printing, and matt printing. The characteristics of these special glossy printing processes are that the printed packaging is brilliant, colorful, colorful, and unpredictable. It not only improves the product quality, increases the added value of goods, and enriches the diversity of the packaging products, but also has a certain degree of particularity. As a result, it also has a relatively safe anti-counterfeiting effect. At present, most of the above processes use a screen printing process.
4. Laser holographic iris printing
Laser holographic iris printing uses laser holography to make stencils in shockproof rooms and transfer them to certain carriers through certain pressure. Under the irradiation of a 45° light source, it can produce unique effects and three-dimensional effects of colorful and colorful. The strong three-dimensional image is deeply favored by consumers. At present, cold-press coating and hot-stamp printing are two kinds of processes for direct printing. Its craft is more complicated, it is very difficult, anti-counterfeit effect is very good.
Fourth, printing paper security
Anti-counterfeit paper printing preferred watermark paper. Watermarked paper is a paper in the manufacturing process, the use of technical means to the required logo, pattern, etc. in the paper. For example, embedding a metal wire in paper, which is called a security thread, is not easy to see in normal circumstances, and can only be seen by transmitting strong light. Most of China's renminbi is printed using watermark paper. Now the use of a special type of ink in the security printing—waterproof printing mark ink, is printed on ordinary copper plate paper, and the watermark effect is vivid, and is mainly applied to wine packaging.
Fifth, security printing substrate
With the rapid development of high technology, papermaking technology is also constantly developing. The produced material can be reflected in a variety of colors under different light pearl paper, laser film paper, laser washed paper, washed light silver dragon, washed silver silk dragon and other special security paper. These substrates are the best and most ideal anti-counterfeiting materials in our security printing.
With the continuous development of the times and the progress of science and technology, we believe that the high-tech process of security printing will certainly play an increasingly important role.
Reprinted from: Shenzhen Barcode Printing