Compared with four-color printing, high fidelity printing improves the reproduction and authenticity of printing colors by adding red, green, blue, orange and other color inks on the basis of C, m, y, K four-color printing.                            . To improve the clarity of printed matter as the goal, the use of high-definition dot printing is called high-definition printing. High definition printing technology can effectively reduce the distance between dots and improve the clarity and level performance of printed matter. 2. Gamut    the main characteristics of high fidelity printing technology include three aspects: first, except for black ink, C, m, y and other added color inks participate in color separation and neutral gray balance; second, the change of printing color gradient is closer to the change effect of real spectral color than four-color printing, with strong hierarchical and three-dimensional sense of printed matter; third, the color gamut of printing is increased. In four-color printing, due to the limitation of ink material and production process, there is a big gap between the spectral curve of ink and that of ideal color, and the color gamut of printing is small.                                         Base color. Using different ink combinations, the range of color gamut expansion is also different. For example, printing with C, m, y, K and adding R, G, B three color ink, the secondary color R, G, B can be vividly reproduced, and its gamut range has been significantly expanded. High definition printing technology is to improve the clarity of printed matter as much as possible. The quality of printed matter mainly depends on the number of dots per unit area and the number of successive changes of dots from small to large. The more the number of dots per unit area is, the higher the clarity of the printed matter is, and the more the change order of the dot is, the better the level expression of the printed matter is, and the better the quality and appearance of the printed matter are. However, the printing gamut will not increase because the color gamut is determined by the color of the base color ink. As long as the base color ink remains unchanged, the color gamut of printing will not change. At present, only high fidelity printing technology can really expand the color gamut of image printing, making the printing color more bright and bright, closer to the real effect of nature. 3. Key technology                      3. At present, there are two commonly used color separation modes: one is to use the principle of color conversion proposed by ICC, that is, to convert the original color into printing color separation color through iccprofile, and the actual method is to look up the table. Compared with four-color separation, high fidelity printing needs to divide the color space reasonably, so that the ink color matching input color has the minimum metamerism index, and improves the matching accuracy. The other is to measure the tristimulus value of CMYK four colors and the RGB interlacing obtained by overprinting, and calculate the color separation value by Neugebauer equation, that is, the dot area ratio for color separation, which is a mathematical model. The goal of high fidelity color separation is to make the print color as close as possible to the visual experience of the real scene. The key technology of high definition printing is the reduction of dot size and the appropriate arrangement of dot. Using FM dot for high definition printing, the smaller the dot, the more dots per unit area, and the better level performance. FM screening printing high definition, not limited by the screen angle, not like the AM dot "Rose spots" and "moire", has obvious advantages. However, the FM screen has large spatial resolution redundancy and low resolution of step, so it is suitable for printing images with strong texture and rich details. When using am dot printing, it is necessary to select a suitable dot layout to avoid "Rose spots". Am screen is suitable for printing images with fine color and light changes. At present, high definition am dot can give full play to the potential of existing equipment, and maximize the clarity and fineness of printed matter.
Dongguan Beite packaging materials Co., Ltd. - located in Dongguan City, the world's manufacturing city, is a subsidiary of Beite packaging (China) Co., Ltd., with a plant area of 6000 square meters. It is a flexible packaging enterprise integrating R & D, production and sales. It has a complete set of domestic advanced production equipment, a scientific and humanized management system and a group of experienced technical personnel For backing, to provide customers with quality products and first-class service.
The company produces composite bags, roll film, fruit bags, aluminum foil bags, suction mouth bags, self-supporting bags, zipper bags, anti-static bags, special-shaped bags, etc., which are suitable for the internal and external packaging of food, daily chemicals, electronics, toys, medicine, cosmetics, industrial products and other industries.
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