Three factors affect the quality of inkjet printing

I. light

In nature, all colors are composed of different wavelengths of light. When light passes through a prism, it is possible to see the spectrum of light of various wavelengths. "Spectrum" can be described as a natural phenomenon of continuous color mixing, but we can use it to define color changes and further manage the desired color. On TV, in movies and on computers and screens, we all use the "additive color method" to process color changes. It contains three main colors: Red, Green, and Blue, also known as the three primary colors (R, G, and B).

All colors can be superimposed by the light of these three different colors. But in the case of printed matter, the human eye determines the difference in color by the reflected light. When seeing a piece of red paper, the original light shines on the paper, and the red light in the spectrum is reflected, so it is known to be red. So in print you must use the "subtractive" method of defining colors, the so-called C, M, Y (Cyan green, Magenta, Yellow Yellow) trichromatic model. For colored light, red, green and blue can be combined to produce white light, but when using water colors or pigments, you will find that the color will be more and more dark, red, green and blue combined is not white.

Therefore, C, M and Y are complementary to each other to create different colors. However, since C, M and Y cannot be combined to produce pure Black, the color printer then separates Black to form a complete subtractive model of C, M, Y and K, so as to achieve more perfect printing quality. Color printing quality must be true to the color; "Addition principle" and "subtraction principle" are two major systems in color science. How to accurately convert the color of the light source system (R, G, B) into the ink-jet or printing system (C, M, Y, K) is a very complicated knowledge. However, only by accurately converting the color can we achieve real and high-quality results. Therefore, accurate color conversion technology is a key factor affecting print quality.

Ii. Resolution

For black and white laser printers, resolution may be the key to print quality, but for color printers, levels are as important as resolution. DPI resolution is DotPerInch's code, which means how many dots can be printed on an inch width. For black and white laser printers, the higher the resolution, the smaller the color levels, the better the print quality. But for color printers, resolution is how many inks can be printed on an inch of width, regardless of whether the inks overlap.

Third, levels

An output image is made up of many dots (or pixels), each of which is a different color and brightness to form the image. For example, on the monitor of TV or computer, beautiful picture quality can be presented, let our eyes feel the image is very lifelike. However, the resolution on the computer monitor is 640×480dpi or 1600×1200dpi, and the resolution on the TV is even lower.

Since the color is analog output, the use of voltage to control the color, so that each point can be shown in a continuous level (full tone). So even if the resolution is lower than the printer, it still feels very natural, so the level of color is very important. Therefore, some printers change to six colors to print colors, the original C, M, Y, K four colors plus another light blue and light red two colors, the advantage is that when mixing colors is no longer just through the original C, M, Y, K four colors to color, but through six colors to make the picture quality closer to the continuous color level. As the number of primary colors on the graph increases, the image becomes more realistic.