Special printing can not be explained by the special format of the printing format, but should be categorized by the differences formed by the printed products. Of course, they are still developed and changed based on the four major formats of letterpress, lithographic, gravure, and stencil. . We have always used paper as the benchmark for performance. However, special printing can be performed using a variety of different materials. Therefore, the method of making a plate and the method of printing also vary. For example, the most basic material, such as Cellophane, plastic skins, artificial crepe paper, metal tubes, aluminum foils, etc. can all exhibit their unique personality. In recent years, many other products use cellophane as the material for printing, based on the unique personality of their products, and require special equipment and special technologies, such as cellophane is used for packaging food and other factors, so the ink used must be carefully considered, can not And chemical changes in food or affect the taste of food. Others, such as printing materials, are dependent on the production of new technologies. Because the phenomena exhibited by all kinds of special printing are beyond the ordinary people's living environment, they are valued and used by designers. Of course, many performances have to choose special printing methods.
Aluminum foil printing
Aluminum foil is a thin piece of aluminum foil. Like paper, it usually has a thickness of about 0. 叩, about mm-0.02mm. When it is pressed to the final stage, it is simultaneously rolled in two pieces to make it become aluminum foil on both sides of the front and back. . The main characteristic of aluminum foil is to prevent moisture, and it can have a shading effect, so the most commonly used is cigarette packaging or film packaging. There are many situations where the use of paper or plastic film on the back of aluminum foil is more versatile.
Most of the aluminum foil printing uses gravure printing, aluminum foil is reel type, so the press will use a round rotary press. Usually a large number of packages or a large number of prints are used. Because it has the largest amount of moisture and moisture, it is usually used in food packaging
Cellophone printing (Cellophone)
The main characteristic of Celollo paper is moisture-proof and bright, so it is also used in food packaging and is very beautiful and hygienic. The Selore paper is a transparent paper that is surface-treated and back-treated after printing to make it a plastic film, which is divided into two types, transparent and opaque. Transparency is transparent paper welding plastic film, opaque are divided into three kinds: one for the metal foil welded plastic film, the second for the paper welded plastic film, the third is transparent paper and metal foil welding plastic film at the same time. Generally, it is printed by gravure printing method. Since Zeluoluo paper is of the reel type, the printing press is a rotary gravure printer and is also suitable for a large number of printed materials such as food, textiles, pharmaceuticals, cigarettes, cosmetics, machinery, etc. Parts, fruits, seafood and more. In addition to gravure printing, Celollo printing also uses lithography and stencil printing.
Tin printing
Metal printing has seen a lot in everyday life, such as canned food, candy boxes, food packaging, and so on. Since the metal sheet itself is a bright material, it is printed with more colorful colors. Tinplate printing generally uses lithographic printing; tinplates are washed with acid prior to printing, and then can be printed on a layer of antirust paint. After printing is completed, the cans are processed. Of course, especially in canned foods, special treatment is needed to avoid causing side effects to foods. Generally used tinplate material is cheap but easy to rust, so it is overcome by a new material, that is, aluminum skin; aluminum skin produced by extending aluminum block, and then processed by internal processing, is the best material. Beer cans are generally used in Europe and the United States and most of them can be used by others. Their future is unsurpassed.
Hose printing
Hose printing is also an extremely common print. The so-called hose refers to the soft metal, such as lead, aluminum, tin and the like, the most common day for the plaster tube, ointment tube, paint tube and so on. Since the contents of the contents are different, it is extremely important for the internal paint to prevent chemical changes. Hose printing generally uses dry lithography as the most common, automated equipment, using a consistent operation method, from the inside of the hose to the surface of the printing, and finally irrigating the contents of re-packaging, the production volume is extremely fast. This kind of machinery and equipment is not a general printing press, but a special equipment.
Plastic Film Printing (Plastic Film)
Plastic film is produced from a variety of synthetic resins. Since there are many types of products produced by various brands, it is extremely confusing. However, there are no major problems in terms of general printing conditions. The main reason is that the properties of plastic films must be considered. , namely: 1 the flexibility of the mechanical tension when printing; 2 the impact of the ink on the non-absorbing surface; 3 heat shrinkage.
From the point of view of printing methods, the most used gravure printing has a rich hue, the transfer amount of ink is very good, and various resin solvents are easy to use. Others such as lithography, letterpress printing, and stencil printing are also used. Plastic film printing is separately printed and then affixed with other films. For example, in food packaging, its packaging materials must be moisture-proof, odor-free, tasteless, and air-proof, and other types of automatic packaging machines. The cooperation of conditions can also affect the degree of printing of plastic sheets.
Three-dimensional printing
After the printed matter is processed and processed, people can see it and produce a deep three-dimensional impression. This is a new product of the printing technology. It cannot be ignored in the future. Stereoscopic printing is generally classified into two types: transmissive and reflective. The transmissive type means that the back of the three-dimensional printed article is irradiated with a fluorescent lamp to visually produce a three-dimensional effect. The reflective type is to apply a transparent lens with a beam-cutting effect on the surface of the printed material, thus visually creating a stereoscopic effect. Through three-dimensional printing is the use of color film or plastic film as a material, printed in lithographic printing. Reflective three-dimensional printing is to use coated paper, such as coated paper, to implement precision lithographic multi-color printing, and transparent plastic to make wavy transparent lenses, and then put the transparent lens on the top of the printed material Serve.
Three-dimensional printing consists of manuscript photography, plate making, printing, and final laminating. It is necessary to adopt a consistent operation mode because of the convenience of the work, especially the more complex three-dimensional printing. The most complicated three-dimensional printing and even more than five layers of multi-image overlap, based on the needs of technology, at the time of photography is to use two-image three-dimensional photography. In short, three-dimensional printing is a product that uses the interaction between optics and printing. Furthermore, the visual illusion is also the most important key.
The three-dimensional printing is widely enjoyed by people because of its special interest in products. It is also widely used in advertising media, such as landscape postcards, calendar cards, POPs, labels, elevators, playing cards, matches, and so on. Its future is ambitious and worthy of research and development.
