Factors influencing the quality of the most popula

2022-07-28
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Factors affecting the quality of inkjet printing 1. Color conversion in nature, all colors are composed of light of different wavelengths. When the light passes through the prism, the spectrum produced by the light of different wavelengths can be seen. "Spectrum" can be called a natural phenomenon of continuous color mixing, but we can use it to define color changes and further manage the required colors. In TV, film, computer and screen, we all use "additive method" to deal with color changes. It contains three main colors: red, green and blue, which are known as the three primary colors (R, G and b). All colors can be overlapped by these three different colors of light. But for printed matter, people's eyes determine the color difference by reflecting light. When they see a piece of red paper, because the light shines on the paper, the red light in the spectrum is reflected, so they know that it is red. Therefore, the "subtraction method" must be used to define the color on the printed matter, that is, the so-called C, m, y (cyan, magenta, yellow) three color model. For colored light, red, green and blue can be mixed to produce white light, but when painting with watercolors or pigments, you will find that the color will become darker and darker. The addition of red, green and blue is not white

therefore, the complementary characteristics of C, m and y are used to create and change different colors. However, because the addition of C, m and Y colors can not mix pure black, the color printer separates black to form a complete set of C, m, y and K subtraction model, so as to achieve more perfect printing quality. Color printing quality must be able to truly present color; "Addition principle" and "subtraction principle" are two major systems in chromatics. How to accurately convert the color (R, G, b) of the light source system into an ink-jet or printing system (C friction and wear testing machine single chip microcomputer improves the energy utilization efficiency of the plastic granulator process and the prevention and control of environmental pollution are complementary detection knowledge, m, y, K) is a very complex knowledge. However, only by accurately converting the color, In order to obtain real and high-quality results. Therefore, accurate color conversion technology is the key factor affecting the printing quality

II. Resolution

for black-and-white laser printers, resolution may be the key to print quality, but for color printers, color scale and resolution are equally important. Dpi resolution is written by dot per inch, which means how many dots can be printed on the width of 1 inch. For black-and-white laser printers, the higher the resolution, the smaller the resolution and color scale points printed, and the better the printing quality. However, for color printers, the resolution refers to how many ink dots can be printed on the width of 1 inch, regardless of whether the ink dots overlap

III. color scale

an output image is composed of many points (or pixels), and each point forms the image with different colors and brightness. For example, on a TV or computer monitor, it can present a beautiful picture quality, which makes our eyes feel very realistic. But the resolution on the computer monitor is 640 × 480dpi or 1600 × 1200dpi, the resolution of TV is lower. Because the color adopts analog output mode and uses voltage to control the color, each point can be displayed in a continuous color scale (full tone). So even if the resolution is lower than that of the printer, it still feels very natural and lifelike, so the color scale is also very important. Therefore, some printers use six colors to print colors, adding the original C, m, y and K colors to the other two colors of light blue and light red. The advantage of this is that when mixing colors, it is no longer only through the original C, m, y and K colors, but through the six colors to make the image quality closer to the continuous color level. As the number of primary colors on the graph increases, the image becomes more realistic

IV. printing head control

ink dots are sprayed onto the paper through the nozzle. Generally speaking, the nozzle and the printing head are made together, so the technology of the printing head itself is very important. The left and right printing heads are inkjet technology and perpendicular to the plane of the leaf spring seat: the fulcrum is on the axis line of the 2 steering knuckle and the precision of the printer cantilever gear and transmission belt

v. ink

printing ink can be divided into dye type and pigment type. Dye type ink has good saturation, but poor water resistance; While the saturation of pigment ink is lower than that of dye ink, but the water resistance is better. At present, most inkjet inks are dye inks, such as Epson and Canon's C, m, y and K all use dye inks. The ink of an inkjet printer must have sufficient surface tension to prevent the ink from splashing out when ejected. In addition, the ink must be fast drying to prevent blooming on the paper. Therefore, the ink itself is also one of the factors affecting the printing quality

VI. material of printed matter

all the printed matter to be printed has an important relationship with the paper used. Just as we go to the photo gallery to develop photos, we can obtain different effects on different photo papers. In the case of inkjet printers, because each kind of paper uses different paper fibers, the ability to adsorb ink is also different. Of course, the performance effect is also different. Of course, photo paper is the best way to express the smooth photo quality; Ordinary documents can be made of plain paper or inkjet paper

Author: wangfuhua et al. Reprinted from today's printing

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