Laser rainbow holographic printing features and types of details
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The application of laser holographic logo in the field of packaging and printing has increased year by year. The anti-counterfeiting of cigarettes, wine, medicine, cosmetics and other products is inseparable from the laser holographic logo.
Laser holographic printing, ie laser rainbow holographic printing, is a high-tech printing process that utilizes optical technology. It not only can reproduce the main image of the original object, but also can display different side shapes of the original with the change of the direction of the line of sight. The laser holographic image uses the principle of white light diffraction grating to make the image effect changeable, colorful, colorful and colorful. The level is obvious, the vividness is vivid, the information and technology content is high, the production and copying technology of laser holographic image is high, it requires professional talents, the processing technology is complicated, the equipment is expensive, and the image itself is difficult to be copied. Therefore, it is in the 20th century. It has been widely used in the field of anti-counterfeiting. At present, with the introduction of high-tech such as cryptographic holography, three-dimensional holography and true color holography, and the popularization and application of embossed holograms by using two kinds of electro-chemical aluminum films, the anti-counterfeiting strength of laser holographic materials is further enhanced. .
Laser holographic material is a new type of high-tech material widely used in packaging and anti-counterfeiting printing. The raw materials used in laser holographic film are mainly PVC, PET, OPP, BOPP, etc. The varieties include laser aluminized film, laser transparent glazing film, laser gilding paper, laser transfer paper, etc. The colors are gold, silver, red and blue. Green, black, etc. The laser holographic material integrates the anti-counterfeiting technology of laser holographic image with good anti-counterfeiting effect with printing and decoration technology such as hot stamping and molding, which makes the product more anti-counterfeiting performance while improving the decoration decoration effect. In addition, laser holography technology is combined with other technologies to produce high-tech products such as laser holographic and fluorescent anti-counterfeiting film, flexible transparent laser holographic anti-counterfeiting film, nuclear security anti-counterfeiting laser holographic film, etc., which improves the quality and anti-counterfeiting of laser holographic film. effect.
The laser hologram is produced by the method of spatial frequency coding according to the principle of laser interference. The application of laser holographic logo in the field of packaging and printing has increased year by year. The anti-counterfeiting of cigarettes, wine, medicine, cosmetics and other products is inseparable from the laser holographic logo. At present, a variety of laser holographic materials have been developed and applied to different packaging and anti-counterfeiting printing fields. However, since laser holographic logo printing not only has printing content, but also involves high-tech fields such as laser, therefore, there are some problems in printing, which affect the printing speed and product quality. Laser holographic identification printing knowledge.
Laser holographic marking printing is an anti-counterfeiting printing technology developed by laser holographic imaging technology. A three-dimensional model is illuminated from different angles with a laser beam and reference light split from the laser beam. The light reflected by the model forms an interference fringe containing model holographic information through a slit. The interference fringes are recorded on a photographic film, turned into a nickel plate, and then pressed onto an aluminized film to reproduce the holographic pattern of the model under ordinary illumination. This is the principle of laser holographic printing. The first laser holographic film logo was used for whisky. Later, this logo became popular in the world and was widely used in security printing for various types of tickets, credit cards, and product packaging.
Laser holographic materials are contemporary high-tech products combining embossing holography with optical, chemical, mechanical and vacuum technologies. Laser holographic molding technology belongs to a kind of holographic grating technology, which is a whole process of rapidly copying the material of an imaged object or a multi-stage printing device by using the principle of laser holography. The laser holographic packaging material has high manufacturing technology, sophisticated equipment, complicated process, and the product is easily damaged after being processed, so it has high decorative and ornamental value, and thus the packaging has a good anti-counterfeiting effect. Laser holographic materials expand the technology and use of laser embossing holography to transfer lifelike, dazzling three-dimensional holographic images and various colorful holographic grating patterns to various plastic film and paper-based materials. In addition, with the development of technology, encrypted holography (using special optical coding technology to encrypt in holographic images), three-dimensional holography (holographic image with special three-dimensional object model as target) and true color holography (with high-tech technology) The application of new laser holographic materials, such as image technology that reproduces the color of an objective object, adds to the decorative effect and anti-counterfeiting performance of the product.
At present, laser holographic film image materials are mainly of the following types: the most common laser holographic films are polyester film (PET), polypropylene film (OPP), polyvinyl chloride film (PVC) and water-washed film. Manufacturers can choose different materials according to the application requirements, and different materials have different application ranges.
(1) PET laser holographic film. Due to the stable material, good printability and environmental protection requirements, PET laser holographic film is the most widely used and most used material. It can be bonded with cardboard and printed into various kinds of packaging boxes. Bags, etc., can also be used in a variety of flexible packaging markets, such as food soft packaging or hose packaging. The transparent PET laser holographic film can be made into a molded package. At the same time, PET laser holographic films are often used to print self-adhesive labels, or to make gold and silver, powder and so on.
(2) OPP laser holographic film. In general, OPP's printability is not as good as PET and PVC materials, making it a very limited application in packaging and printing. However, through the improvement of the surface treatment technology of OPP materials, the printing suitability of OPP laser holographic film has made great progress, and customers can easily achieve beautiful printing. The transparent OPP laser holographic film is also a good glazing material, which can bring a completely different feeling to the printed matter. In addition, OPP laser holographic film is also an ideal material for flexible packaging.
(3) PVC laser holographic film. Although the use of PVC is limited in European and American countries with strong environmental awareness, it still has considerable applications in printed matter due to its excellent printability. PVC laser holographic film is often made into various Christmas ornaments, spring couplets, greeting cards, etc. The passionate Latin American people also use a lot at the carnival. The dazzling laser holographic luster can add festive atmosphere to the festival, so it also Very popular with consumers.
(4) Laser holographic water washing film. The laser holographic water washing film is made of a PET laser holographic film, an OPP laser holographic film and a PVC laser holographic film. The so-called water-washing membrane is to remove the electrochemical aluminum from the membrane surface by using sodium hydroxide, so that the membrane surface has a unique transparent pattern or a specific trademark, graphic, etc., which can be directly used as wrapping paper or laminated. After the carton, bag, book cover, etc., not only beautiful, but also anti-counterfeiting effect, it is mainly suitable for brand packaging.
(5) Nuclear nuclear laser holographic film. As a high-tech anti-counterfeiting technology, nuclear track anti-counterfeiting technology, together with "heavy-ion micro-hole anti-counterfeiting", is called two "nuclear weapons" in the field of anti-counterfeiting. Nuclear track anti-counterfeiting technology is to use the nuclear reactor and other nuclear materials to smash the plastic film, form track damage in the plastic film, and then form the nuclear track micro-hole anti-counterfeiting pattern required by the imaging technology. Finally, after the later commodity processing, the nuclear track micro-hole anti-counterfeiting mark or other forms of nuclear track micro-hole anti-counterfeiting technology products are obtained. It has the advantages of high technology content, difficult to copy, easy to identify, low cost of production, and good compatibility with other technologies. It can be said to be a trend to guide the development of anti-counterfeiting today and in the future. Nuclear track anti-counterfeiting technology products can perform multiple identifications to improve the reliability of common identification. It also has one-line and two-wire anti-counterfeiting functions. For example, the first-line anti-counterfeiting label polymer nano material VCC-nuclear track anti-counterfeiting with superior performance can be easily and easily tested by ordinary consumers with a drop of water or a pen. At present, it has been packaged in famous tobacco, alcohol, audio-visual, books, high-end brand-name products, etc.; it is also widely used in passports, cards, and ticket security. Combining the nuclear track with the laser holography technology, that is, the anti-counterfeit encrypted image of the nuclear nucleus formed on the laser converging film, can greatly improve the anti-counterfeiting effect of the laser holographic film.
In addition to laser holographic films, there are currently other laser holographic materials.
(1) Laser holographic paper. Can be divided into film stickers and pure paper. The film sticker is made by bonding laser holographic PET or OPP film to different types of paper. The bonded cardboard is not only more rigid, not easy to tear, and the film surface is waterproof. Laser holographic pure paper directly prints the laser hologram on paper through advanced imprint technology. Its biggest feature is environmental protection. Whether it is a laser holographic film sticker or a pure paper, it is suitable for general ink or UV ink printing. In addition to the excellent carton, book cover or poster material, it is also used for gift wrapping paper, chewing gum, soap and other packaging. In addition, the label is another major area of laser holographic paper application. In order to meet the needs of this market, laser holographic paper has introduced laser holographic wet paper, which is pure paper, but will not be exposed to low temperature or humid climate. It is destroyed and can be made into an automatic washing standard, so it is especially suitable for use on labels for recycled bottles and refrigerated foods.
(2) Laser holographic hot foil. Laser holographic foil is a holographic laser processing of thin foil with hot stamping function to form two-dimensional, three-dimensional, dot matrix, spiral, synthetic hologram and other images. It has high gloss, colorful and variable colors, and overcomes the problem. Ordinary bronzing technology has the defects of monotonous form, low quality and lack of anti-counterfeiting effect. Laser holographic foil has common hot foil and transparent laser holographic foil. In laser holographic foil, different holographic effects can be combined with each other. At the same time, it can also add two channels, partial aluminum plating, color separation effect and micro lettering. A variety of anti-counterfeiting elements, such as hidden information, in the processing of surface finishing of printed products and paper, with effective high-level anti-counterfeiting means to achieve its unique copyright protection. In addition, the laser holographic foil coloring layer is a grating, and the color or image is not a pigment, but a holographic pattern formed by a microscopic pit (grating) on the surface of the transfer layer after the laser beam is applied, and the generation thereof is quite complicated and has a good Anti-counterfeiting effect, the application range of hot foil is mainly the packaging of valuable ticket, tobacco and alcohol, medicine, fashion, clock, computer software, etc., special surface decoration after label printing, in addition, laser holographic scratching bronzing, suitable for Password protection for lotteries, phone cards, etc., with anti-counterfeiting and decorating effects.
(3) Laser holographic cold foil. It uses a printing and pressing technique to transfer the laser holographic foil onto the substrate. It breaks the traditional process of traditional hot stamping relying on hot-pressed transfer of gold foil, and the use of a new technology - cold pressing technology to transfer gold foil, not only solves the difficult process problems in hot stamping printing, but also avoids the production of metal plates. The pollution caused by the environment during the process can also save a lot of energy. Cold foil has the advantages of fast printing speed, short production cycle, wide application of materials, high printing precision, good anti-counterfeiting effect, cost saving, full utilization of original equipment, improvement of production efficiency, compliance with environmental printing requirements, etc. The latest scientific and technological achievements in the industry. Laser holographic cold foil can also be transparent and cold, achieving the uniformity of anti-counterfeiting and brand identity.
(4) Laser holographic aluminum foil. It is to print a laser hologram on the ordinary aluminum foil, thereby improving the anti-counterfeiting function and appearance of the package. It has good processing adaptability on the packaging and is very suitable for mechanized production. The main application of aluminum foil is pharmaceutical packaging. Because of its excellent light-shielding, moisture-proof, gas-blocking and taste-keeping properties, it has almost absolute barrier protection for the light, gas, moisture and taste of medicines, thus greatly improving The shelf life of the drug. However, the general aluminum foil has no anti-counterfeiting function, and the laser holographic aluminum foil has a laser holographic processing technology, so that the counterfeiter can not easily obtain or copy the same material, thereby improving the anti-counterfeiting performance of the medicine.