First, the level of differentiation For black and yellow, this method is very practical. In general, in the four-color version, the black version is copied in a short tone, so the level is very small and it is easy to identify; because in most of the works, the yellow components are relatively heavy, so it seems that the yellow version is full of layers. It's very confusing and it's better to recognize. The level of both the magenta version and the cyan version are similar, and if there is no separation experience, this method is often easy to confuse.
Second, the characteristics of the color distinction is generally experienced prepress workers, use this method to distinguish. Because it meets the principle of color separation, it is highly accurate to use. We know that after color separation by the color filter, each color version has its basic color and opposite color. For magenta, the basic colors are magenta, red, blue-purple, and black, and the opposite colors are yellow, cyan, green, and white.
Therefore, all the red, blue-purple, and magenta colors should have a deep black color on the magenta color separation film. We can find some relevant color features, such as red flags, red stamps, characters' lips, etc. It should be dark on the magenta version and light on the cyan version. On the contrary, some sky, sea, forest, etc. are light colors on magenta and dark on cyan.
Third, the angle distinction This is the use of a magnifying glass, from the perspective of film color separation to observe. In general, the yellow version always has an angle of 90. This is based on the characteristics of the weaker version. Because magenta, cyan, and black are strong-colored versions, they must be protected from the appearance of moiré, and they are often arranged at a difference of 30 degrees from the angle of 45, that is, 15, 45, and 75.
The angle of the strong color version can be determined according to the characteristics of the original document, and there is no fixed angle. The yellow color is a weak-colored version. Even if the moiré appears, the human eye is not easy to observe. For square dots and circular dots, when the fourth ideal angle cannot be arranged in one quadrant, the worst angle gives it. Therefore, its angle is arranged at 90. Note that since the angular arrangement of the chain points is from 00 to 180, there is another difference for the chain points.
Fourth, if there are proofs in the net flower division method, you can also use proofs to divide the net flower. A piece of color separation film is put on the sample sheet and slightly rotated at an angle. Some colored net flowers, namely moire, will appear in the tone area. If a magenta net is present, the film is a magenta version; if it is a cyan, it is a cyan version. Why is this?
We know that when the difference between the two dot angles is smaller, the bigger the square pattern is, the more obvious it is. When a monochrome film is placed on a proof sheet, its angle is the same as the true color of the four-color proof sheet. After the film is slightly rotated by an angle, the difference in natural colors between the film and the four-color proof sheet is small. A small angle difference is very easy to generate an obvious flower.
This helps us to easily recognize the color of the film. In summary, we can sum up the quick and effective method of distinguishing different colors.
Second, the characteristics of the color distinction is generally experienced prepress workers, use this method to distinguish. Because it meets the principle of color separation, it is highly accurate to use. We know that after color separation by the color filter, each color version has its basic color and opposite color. For magenta, the basic colors are magenta, red, blue-purple, and black, and the opposite colors are yellow, cyan, green, and white.
Therefore, all the red, blue-purple, and magenta colors should have a deep black color on the magenta color separation film. We can find some relevant color features, such as red flags, red stamps, characters' lips, etc. It should be dark on the magenta version and light on the cyan version. On the contrary, some sky, sea, forest, etc. are light colors on magenta and dark on cyan.
Third, the angle distinction This is the use of a magnifying glass, from the perspective of film color separation to observe. In general, the yellow version always has an angle of 90. This is based on the characteristics of the weaker version. Because magenta, cyan, and black are strong-colored versions, they must be protected from the appearance of moiré, and they are often arranged at a difference of 30 degrees from the angle of 45, that is, 15, 45, and 75.
The angle of the strong color version can be determined according to the characteristics of the original document, and there is no fixed angle. The yellow color is a weak-colored version. Even if the moiré appears, the human eye is not easy to observe. For square dots and circular dots, when the fourth ideal angle cannot be arranged in one quadrant, the worst angle gives it. Therefore, its angle is arranged at 90. Note that since the angular arrangement of the chain points is from 00 to 180, there is another difference for the chain points.
Fourth, if there are proofs in the net flower division method, you can also use proofs to divide the net flower. A piece of color separation film is put on the sample sheet and slightly rotated at an angle. Some colored net flowers, namely moire, will appear in the tone area. If a magenta net is present, the film is a magenta version; if it is a cyan, it is a cyan version. Why is this?
We know that when the difference between the two dot angles is smaller, the bigger the square pattern is, the more obvious it is. When a monochrome film is placed on a proof sheet, its angle is the same as the true color of the four-color proof sheet. After the film is slightly rotated by an angle, the difference in natural colors between the film and the four-color proof sheet is small. A small angle difference is very easy to generate an obvious flower.
This helps us to easily recognize the color of the film. In summary, we can sum up the quick and effective method of distinguishing different colors.
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