What is the tonal standard for color printing
The general business to do publicity is to be able to show their products to customers very really, then at this time the color of the color printing design is very important, because now is not the sixties and seventies, only black and white, the current society is very exciting, people also pursue a wonderful life, so the color matching standard is particularly important. Tonal standards for color printing design In printing design, the three primary colors of ink are mixed in different proportions to obtain the desired color spectrum hue value. The density of the three primary colors ink on the substrate of the printing design is correct and balanced and has a direct relationship with the printing designer. Although the print design operator can only measure and set the ink density within a limited range, these density ranges can help the print designer obtain a wide range of overprint ink colors, whether the ink is transparent or the substrate is pure white. These density ranges can be easily found in print design in a variety of relevant publications: they are described in the FIRST and SWOP standards. The ink density range in the print design according to the guidelines can be used for any ink overprint order, i.e. YMC, YCM, CMY, CYM, MCY or MYC. But does each sequence in the print design produce the same color? Not really. Even when the solid density is controlled at an absolute value, each overprint sequence in the print design will produce different red, green, and blue overprint colors, because the ink formulation on each print design has different properties, such as the opacity of the ink, which affects the opacity. Therefore, the surface of the dry film layer of the ink that is printed first (printing design) will affect the adhesion characteristics of the wet ink that is printed later (printing design). Yellow pigments have poor coverage, while magenta and cyan pigments have good coverage. However, the surface energy of yellow pigment inks is high. The first step in color management in print design is to determine the best ink overprint order and density balance that provides a high color rendering range. The GATF Association developed a simple color hexagonal color map many years ago to visualize the ratio of different colors. The density meter can show the quality of color by measuring hue deviation, grayscale, and overprint color, and compare it to the three primary colors. For example, in a hexagonal color map, the three corners that do not coincide with each other are the three primary colors of the ideal ink (YMC), the other three corners are overprinted composite colors (RGB), and the center of the hexagon is a neutral color (white to gray to black). The stronger the ink, the closer it is to the corners and the farther away from neutral colors. When the process colors and composite colors of the actual print design are distributed into a hexagonal color map, the density, color difference, and grayscale values of the CMY and RGB colors are revealed. Because the ink is not too ideal, the distributed hexagons (irregularities) will not be the same size as the entire ideal hexagonal color map, but it can be used as an optimized print. Therefore, the GAFT method can be used to display the three primary colors and composite color information of the printing design by using the irregular hexagonal distribution to obtain the best density and overprint order. By measuring the size of the coverage area of the color, the color performance of the whole ink and the contrast strength of the color of the printing design are determined, of course, the larger the area, the better. Other density values can also be distributed as part of the print design measurement sequence, such as 25% dots, 505 dots, and 755 dots density values for color. If the distribution of these other tonal values is concentrated, it means that the print design is under control, and conversely, if the distribution is not concentrated, it means that the print design is out of control and the necessary adjustments should be made.