Detailed explanation of common quality control bar in printing (2)

3M Color Printing Control Strip 3M's color printing strip (for positive PS version) - MATCHPRINT CO-LOR ELEMENT 3M, as shown.

The measurement and control strips are from left to right and from top to bottom, and each measurement and control unit is:
(1) Within the 6mm*6mm square box framed by the black line, there is no ink cover, which is the nature of the substrate.
(2) There are five consecutive 6mm*6mm squares. They are 20%, 40%, 60%, 80% circular dot blocks and 100% solid blocks for CYAN Cyan ink (60 dots/CM, respectively). Same as below).
(3) Octagonal blue-violet solid block (C+M solid block).
(4) 5 consecutive squares, 20%, 40%, 60%, 80% of MAGENTA's magenta ink, circular dot block and 100% solid block.
(5) The octagonal red solid block (M+Y solid block).
(6) Five consecutive squares, respectively 20%, 40%, 60%, 80% of YELLOW yellow ink, circular dot block and 100% solid block.
(7) Octagonal green solid block (C+Y solid block).
(8) 5 consecutive squares, 20%, 40%, 60%, 80% of BLACK black ink, circular dot block and 100% solid block.
(9) The octagonal multi-colored green solid block (C+M+Y solid block).
Each of the above-mentioned monochrome dot blocks is used to detect the dot gain value, and the 80% square dot dot block can also detect the print contrast value. Each solid solid block is used to determine the solid density in a single color. The octagonal inter-color blocks and multi-color blocks are used to measure the trapping rate when two-color and three-color traps are printed.
(10) There are 11 rectangular blocks for the four groups of cyan, magenta, yellow and black. Each rectangular (3mm*7mm) is composed of octagonal rings that are interlocked with each other. The octagonal line widths are: 2 micron, 4 micron, 6 micron, 8 micron, 10 micron, 12 micron, 15 micron, 18 micron, 21 micron, 24 micron, 27 micron, they are used to check the resolution of the plate.
(11) Cyan, magenta, yellow, black four groups, rectangular blocks, each group has 6 small rectangles (2mm*3mm), they are 98%, 97%, 95%, 5%, 3%, 2% respectively The dot-blocks are used to check the change of outlets in the high-profile and low-profile at the time of printing.
(12) Concentric circles of cyan, magenta, yellow, and black. Each group is composed of 20 differently sized round sleeves. It is used to check whether or not ghosting exists in each color print.
(13) Four rectangular blocks, each of which is 6mm*12mm. In the first rectangle, there are square yellow dots with a dot angle of 75 degrees, dot coverage of 25% and a line angle of 45 degrees, square dots with a dot coverage of 37% and a dot angle of 15 degrees, dot coverage of 26%. Square magenta dots, they form a light gray tone, used to detect line neutral gray balance; the second rectangle has; cable angle of 75 degrees, 62% of the square yellow dot and cable angle of 45 degrees, 81% of the square The screen and screen angles are 15 degrees, and 65% of the square magenta dots form a dark tone neutral ash to detect the ash balance. The third rectangle has: network cable angle of 75 degrees, 62% of round yellow dots and screen angle of 45 degrees, 81% of round blue dots and screen angle of 15 degrees, and 65% of round magenta dots, which form a dark Gray, used to detect the gray balance of a dark circular dot. The fourth rectangle has 75% of screen angle, 25% of round yellow dots and 45° of screen angle, 37% of round blue dots and 15° of screen angle, and 26% of round magenta dots, composed of shallow gray dots. . It is used to detect the gray balance of shallow circular dots.