Prepress knowledge - basic knowledge about film
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The film is black, and the corner of the film generally has an English symbol, which is the number of the film, which one of the c, m, y, and k is the film, which is one of the cmyk (or the spot color number). , indicating the color output of this film, if not, you can look at the angle of the net to identify what color.
The stepped color strip next to it is used for dot density proofreading. In addition to seeing whether the dot density is normal, the color bar is still looking at cmyk, the color bar is c in the lower left corner, the color bar is m in the upper left corner, y is in the upper right corner, and k is in the lower right corner, so just print according to the color bar. The factory knows cmyk. That is to say, in order to conveniently check the concentration of the film development, the film has a color number on the corner. As for the number of colors printed according to the film line of each film. The outlet on the film tells you that "there is a certain degree of color here." For example, the general text version has only one black, and the version has only one film. If you print with red ink, the red letter is printed.
A film film only represents one color, printed in color, at least 4 film films, representing c, m, y, k4 colors! It can also be four spot colors, and the spot color film is output as a k version with a separate file. The color code next to it does not indicate the specific value of cmyk, but is used in comparison to check whether the film meets the requirements. It is customary for people to draw the corners (cut lines, registration lines), and then use the solid color on each version to mark the names of the versions. For example, mark c, m, y, k, special silver, and then fill in the spot colors on the blue, red, yellow, black and spot color plates, so that the film on the film has a logo and is particularly intuitive. The size of the color standard is 10*5mm, and the English letters of the paper color cmyk are printed, and the color blocks correspond one-to-one with the color names. The print-printing workers can look at the corners of the film. In general, the angle of the film's dot is fixed, just like the yellow version of the screen is 90 degrees. There are exceptions. If the yellow expression of the image is concentrated in the range of 90 degrees, the yellow cannot use the 90 angle. Otherwise, the traces of the hanging net are too obvious! According to the usual reason, if a color is produced, a color strip should be used, and in turn, it is clear that in the process of coloring out the non-forest, the situation of drying on each density step is very clear. It is generally four color bars and is arranged neatly.
Most colors are derived from these four colors, so each film is black, but they represent different colors, c, m, y, k, look at the scale to know, and then print four-color ink Come to get.