Справочник Пользователя для Adobe illustrator 10

To produce high-quality separations, it helps to be familiar with the basics of printing, 
including line screens, resolution, process colors, and spot colors.

It is also recommended that you work closely with the print shop that will produce your 
separations, consulting its experts before beginning each job and during the process.

To reproduce color and continuous-tone images, printers usually separate artwork into 
four plates—one plate for each of the cyan, magenta, yellow, and black portions of the 
image. When inked with the appropriate color and printed in register with one another, 
these colors combine to reproduce the original artwork. The process of dividing the image 
into two or more colors is called color separating, and the films from which the plates are 
created are called the separations. 

Artwork is separated into CMYK output when you’re preparing an image to be printed 
using the process colors cyan (C), magenta (M), yellow (Y), and black (K). (The letter K is 
used for black to avoid confusion, because B might also stand for blue.) 

You can use custom inks, called spot colors, in addition to or in place of process colors. 
Because a spot color is printed on its own plate, spot colors can often reduce the 
complexity and cost of printing artwork. 

For example, instead of using the four process colors to reproduce artwork consisting of 
black text and bluish-green line drawings, you could use two spot colors—one of black 
and one representing that exact shade of green. In addition, you can use spot color inks to 
produce colors not reproducible by CMYK inks, such as fluorescent and metallic colors.

You can use the Color palette to display the CMYK equivalent of a spot color.

If you want to print a color on all plates in the printing process, including spot color plates, 
you can convert it into a registration color. Registration color is typically used for crop 
marks and trim marks. (See 

1 Select the object on which you want to apply registration color.

2 Choose Window > Show Swatches.

3 In the Swatches palette, click the Registration color swatch  , located in the first row of 
swatches. The selected objects are converted into registration color objects.