Four-color print printing to do white version?

There is a situation where, for example, printing on the Yellow Pages phone book requires printing a set of white (a white color patch) containing the area to be printed and then printing four colors, of course, on other colored materials. Printing, but do not want to fold four colors, also need to print white.

If you only have white areas on the printed area, how do you design white plates? Four-color printing can be used to separate out the channel, out of the white version to do it, if the printed body is solid, the white version to paint it? Is there an easy way?

Create a black version of the same area as the printed one. Mark it as a spot color white. Print first and then print white and print four colors. The white version is actually a spot color version with the same area as the one you need, CMYK+ spot color white. For example, if you want to write on a cement wall, you usually need to apply a layer of white paint first, and then use other colors. The reason is the same.

Film common sense

The film is black. The film's corner usually has an English symbol. It is the film number of the film. It indicates which of C, M, Y, and K is the film. It is one of the cmyk (or spot color). , which means the film is what color output, if not, you can see the angle of the hanging net to identify what color. The next stair-like strips are used for dot-density calibration. In addition to seeing whether the dot density is normal or not, one is to see 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 long as the color printing factory You know CMYK. That is to say, in order to facilitate the detection of the film developing concentration, the film sheet has a color number on the corner. The number of colors printed depends on the screen of each film. The film outlet on the film is to tell you that "here there is a certain degree of color." For example, the general text version is only black, and there is only one film in the print. If you print in red ink, the printed word is red. A film film represents only one color, printing color, at least four film films, representing C, M, Y, K 4 colors! Can also be four spot colors, spot color film is a separate file output into K version. Next to the color code can not show the specific value of CMYK, but used in comparison, to check whether the film meets the requirements. Some people are accustomed to drawing corner lines (cutting lines, register lines), and then using their own solid colors to mark the names of each version. For example, marked with C, M, Y, K, special silver, and then fill in the blue, red, yellow, black and spot colors on the spot color, so that the film came out on the label and is particularly intuitive. The size of the color standard is 10*5mm, and the English letters of the paper-colored CMYK are printed, and the color blocks correspond to the names of the colors. The printing workers can see the edges of the film. In general, the film's dot is fixed, just like the yellow version's screen angle is 90 degrees. There are exceptions, if the yellow expression of the image is concentrated in the range of 90 degrees, then the yellow can not use the 90 corner. Otherwise, the trace of the hanging net is too obvious!! As a general rule, out of a color, you should hit a color bar , In turn, to check that in the process of coloring non-forest, the drying process on each density step is very clear, usually four color bars, and the arrangement is very neat. Most colors are based on the combination of these four colors, then each film is black, but they are different colors C, M, Y, K, see the proportion know, and then by printing four-color ink.