Detailed explanation of common quality control str

2022-09-21
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Detailed explanation of common quality control strips in printing (II)

3M color printing measurement and control strip

3M company's color printing measurement and control strip (for positive PS version) -- matchprint co-lor element 3M, as shown in the figure

the measurement and control strip is from left to right, from top to bottom, and each measurement and control unit is:

(1) the 6mm*6mm square formed by black wire frame is not covered by any ink, which is the natural color of the substrate

(2) there are 5 consecutive 6mm*6mm squares, which are 20%, 40%, 60%, 80% dot blocks and 100% solid blocks of cyan ink respectively (the number of dots and lines is 60 lines/cm, the same below)

(3) octagonal blue purple solid block (c+m solid block)

(4) there are five consecutive squares, which are respectively 20%, 40%, 60%, 80%, dot block and 100% solid block of magenta magenta ink

(5) octagonal dichromatic scarlet solid block (m+y solid block)

(6) there are five consecutive squares, which are 20%, 40%, 60%, 80%, dot block and 100% solid block of yellow ink of yellow ink

(7) octagonal mesochromatic green solid block (c+y solid block)

(8) there are five consecutive squares, which are 20%, 40%, 60%, 80%, dot blocks and 100% solid blocks of black ink of black ink

(9) octagonal polychromatic green solid block (c+m+y solid block)

the above monochromatic dot blocks are used to detect the dot expansion value, and 80% of the square dot blocks can detect the printing contrast value. Each solid monochrome plot is used to measure the field density of monochrome. Octagonal metachromatic solid block and polychromatic solid block are used to measure the overprint rate of two-color and three-color overprint

don't apply too much butter (10) there are 11 rectangular blocks in each of the four groups of blue, magenta, yellow and black. Each rectangle (3mm*7mm) is composed of octagons with mutual rings. The line thicknesses of the octagons are: 2 microns, 4 microns, 6 microns, 8 microns, 10 microns, 12 microns, 15 microns, 18 microns, 21 microns, 24 microns, 27 microns. They are used to check the resolution of the printing plate

(11) four groups of green, magenta, yellow and black, rectangular blocks, each group has six small rectangles (2mm*3mm), and they are 98%, 97%, 95%, 5%, 3% and 2% point blocks respectively, which are used to check the changes of high-key and low-key points during printing

(12) four groups of concentric circles: cyan, magenta, yellow and black. Each group is composed of 20 circles of different sizes, which are used to check whether there is ghosting during printing of various colors

(13) four rectangular blocks, each of which is 6mm*12mm. In the first rectangle, there are: square yellow dots with a point angle of 75 degrees, a point coverage rate of 25%, and a line angle. The software equipment also has many degrees of 45 degrees, square green dots with a point coverage rate of 37% and a line angle of 15 degrees, and square magenta dots with a point coverage rate of 26%. They form light gray, which is used to detect the neutral gray balance of the line; In the second rectangle; The line angle is 75 degrees, 62% of the square yellow dots and the line angle is 45 degrees, 81% of the square dots and the line angle is 15 degrees, and 65% of the square magenta dots form a dark neutral gray, which is used to detect the gray balance. In the third rectangle, there are 75 degrees of line angle, 62% of circular yellow dots and 45 degrees of line angle, 81% of circular green dots and 15 degrees of line angle, and 65% of circular magenta dots. They form dark gray, which is used to detect the gray balance of dark circular dots. In the fourth rectangle, the line angle is 75%, 25% of the circular yellow dot is 45 degrees from the line angle, and 37% of the line angle is 4 Reduce the influence of barrel temperature on color difference. The circular green dot and line angle are 15 degrees, and 26% of the circular magenta dot. Group 2 is a new round of scientific and technological revolution and industrial revolution, which is gestating into light gray. It is used to detect the gray balance of shallow round points

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