On the most popular high fidelity screen printing

2022-08-02
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Talking about high fidelity plus printing technology (Part 2)

high fidelity color adapted to high fidelity printing

before describing the point of high fidelity, we should first understand high fidelity printing. Since the existing paper and ink can not completely reproduce the color gamut of natural color originals, in order to improve the saturation of some colors on the printed matter, pure and bright red, green, blue and purple colors can be printed on the basis of C, m, y and K, so as to make the printed image produce more natural contrast and fresher color sense. This printing method is called high fidelity printing. For example, when the picture of strawberry is printed, the red version and the green version can be added to make the bright red of strawberry fruit and the green of green leaves more pure and lifelike, and the whole picture looks vivid and bright

the distribution of points in FM addition is irregular, and the distribution of silver salt particles in photographic negatives and photographs is also irregular. As long as the points in FM addition are small enough, the printed matter can be fully close to the original and achieve high fidelity. Because FM plus is not limited by shallow angle and has a wide range of color reproduction, it can produce special printing that cannot be achieved by conventional four-color color separation, and can carry out super four-color multi-color printing, so as to create the effect of high fidelity printing. High fidelity point sets a new standard for frequency modulation point technology, which is a pure software method. High fidelity color uses frequency modulation point, which is more than four-color color separation technology. Compared with four-color addition technology, it has made great progress in color reproduction range, printing density, definition and level

1. The development of high fidelity color technology

high fidelity color was officially used as a term at the Seybold Seminar (Boston, USA) in the spring of 1993. At the seminar, Davis company opened a gallery to show the audience the sample printed with FM dot technology. This sample is called the preliminary achievement of the "high fidelity color" scientific research project - the printed matter printed with more than four colors. Up to now, nearly 100 companies around the world have taken part in this scientific research project, including most international companies that occupy a prominent position in the field of prepress technology. The objective of this project is to explore a series of theoretical, technological and market trends related to the adoption of advanced technologies such as frequency modulation point and multicolor addition. At the beginning of 1994, the color separation software launched by the Computer Research Institute of Peking University can realize seven color separation, which is based on the frequency modulation hanging technology and lays the foundation of high fidelity color plate making technology

2. Significance of high fidelity color separation technology

high fidelity printing technology 5. Update service is relative to four-color printing technology. In four-color printing, C, m, y and K four-color inks are used for printing. In theory, as long as the use of C, m, y tricolor ink is enough. But in fact, due to various technological reasons, black ink needs to be added. Similarly, the secondary color superimposed by the two basic colors is not satisfactory, and the spot color ink of the secondary color must be added. For example, the red color produced by the superposition of M and Y inks is not as bright as the special red ink. Under the premise of this theory, high fidelity printing came into being, that is, adding several spot color printing on the basis of four-color printing to expand the color expression ability of printed matter. Conventional color separation technology divides the color of the original into three basic colors: cyan, magenta and yellow, plus black, forming the chromatographic range that can be represented by the printed matter. Compared with natural hue, this range (called color coverage or coverage umbrella) is much smaller when the signals of sensors and encoders are processed and displayed on the computer screen. In other words, the rich colors of nature can not be expressed only by blending with four kinds of inks. One of the purposes of using six, seven and eight high fidelity colors to make printed matter is to expand the range of color reproduction and more realistically reflect nature. Because the color of the printed matter printed with more than four colors can not be reproduced by the conventional four color separation technology, this technology has a special position in the field of high value-added printed matter

3. The color adding problem of high fidelity color

high fidelity color can expand the color space that can be expressed in printing, thus improving the quality of printing color reproduction. One of the problems to be solved by high fidelity color printing is how to correctly achieve the color of the original object in the process of color reproduction, and what colors need to be added in addition to the four basic colors to reproduce the original color more perfectly. Generally speaking, there is no same answer to this question, because different printing materials have different themes and different color emphases. According to the deficiency of traditional four-color ink in color gamut, a multi-color printing method is proposed. However, for general and actual process requirements, there are still basic choices to meet the needs of most users. For example, the basic colors adopted by Kupper (Cooper company) color system and linltype he VCF color system are C, m, y, K, orange red, green and purple, which are characterized by taking the maximum expansion of coverage as the goal in the chromatogram and taking into account the practical aspects of production; The latter has a larger range of chromatographic representation than the former, and the color separation is completed by secondary scanning. Pantone 6-color system adopts the basic colors of C, m, y, K, blue and green. It is characterized by the goal of containing Pantone chromatography and reproducing EKTACHROME offset chromatography as much as possible, and is suitable for many 6-color printing machines in the market. Scitex adopts the basic colors of C, m, y, K, red, green and blue. It is characterized by generating each component of 7 colors from a set of RGB scanning in two operations. The basic colors used by crossfield hyper color are C, m, y, K, C ', M', y ', which can be printed twice by an ordinary 4-color machine. The added same color ink can make the local relative density exceed 2.2, so as to expand the chromatographic range. However, when printing, transparent ink must be used. The metal color and pearlescent color, which are difficult to copy in the traditional four-color version, can be well reproduced by the high fidelity color technology

market prospect of high fidelity printing

in foreign countries, high fidelity C. pallet equipment: the printing when the specimen is cracked, which is important for creep and durability experiments, has been applied in commercial printing, and as a development direction of sheet fed offset printing, its market prospect is promising. For example, hexchrome high fidelity printing is a multi-color double-sided printing process, which has the advantages of single channel, multi-color printing, high profit and high production efficiency. Japanese printing technology is famous for its high-quality and fine prints. In the field of multi-color printing, printing equipment with 8 or more colors has entered the Japanese market. Most of the formats are split, and some are as high as 10 or 12 colors. At the same time, 8-color A2 format and 6-color A3 format printing machines have also landed on the market. In addition, the 5-color double-sided printing machine has also appeared in commercial printing, but from the perspective of cost saving, the product research and development will focus on the web printing machine

adopting high fidelity printing will increase the production cost and have high technical requirements for the production process. For example, to use more plates and inks, the cost is higher than that of four-color printing. In addition, there are also some factors that limit the substitution of high fidelity printing for traditional four-color printing, such as the wide use of multi-color printing machines, the cost of adding films, plates, proofs and inks, etc. In addition, the problem of creating effective color separation and combined high fidelity pages is also an important factor limiting the popularity of technology. The use of high fidelity technology requires the addition of color separation software. High fidelity technology also increases the requirements for the performance of the printing machine, which generally requires more printing units or multiple on-line printing

at present, high fidelity printing is still in the research and experimental stage in China, and is not widely used in commercial printing, but this does not mean that there is no market for high fidelity printing. With the continuous improvement of people's requirements for printing quality, high fidelity printing technology with added value will gradually become practical and commercialized, bringing benefits to printing enterprises. From the current market point of view, there are a lot of prints suitable for high fidelity printing. For example, high fidelity printing, which simulates and copies famous paintings with high requirements for printing quality and restoration effect, can truly and clearly restore the effect of famous paintings, prevent the distortion of their shape and color, maintain the color and artistic charm, and enhance the appreciation effect and collection value. For commercial printing such as advertising, using high fidelity printing will leave a deeper impression on people and improve the publicity effect. However, there is a great demand for high fidelity printing for the printing of calendars that require high quality and can be appreciated for a long time, as well as the printing of commodity packaging and decoration materials

information source: Printing Technology

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