Printing A Color Proof; Calibrating The Screen Image To The Proof - Adobe PHOTOSHOP 5.0 User Manual

92 CHAPTER 5
Reproducing Color Accurately

Printing a color proof

After calibrating your monitor and entering
settings for CMYK Setup, you should print a
CMYK image, called a proof, on the printer you are
calibrating to. The document you use to generate
the proof should contain color samples of all the
CMYK color combinations and must be created or
imported directly in CMYK mode.
You can produce a proof by printing the
Testpict.jpg (Windows) or Olé No Moire
(Mac OS) CMYK image included with the Adobe
Photoshop software, or you can create your own
CMYK image. Do not print an RGB image that has
been converted to CMYK in Photoshop. Instead
use an image that has been saved in CMYK format
without an embedded ICC profile and whose
CMYK values have been assigned directly in
CMYK mode.
Important: Before opening an existing test file, open
the Profile Setup dialog box. In the Profile Mismatch
Handling area, for CMYK, choose Ignore. This will
prevent the file from being converted to a different
CMYK color space, and possibly changing the results
of the test. Reset this dialog box when you are done
printing the file.
For a color illustration of a color proof, see
figure 5-1 on page 224.
To create your own CMYK proof document:
Create a new Photoshop document in
1
CMYK mode.
2 Create a set of swatches that includes the
following:
Four swatches, each containing 100% of the
•
CMYK colors (100% cyan, 100% magenta, 100%
yellow, and 100% black).
Four combination swatches (100% each of
•
magenta and yellow, 100% each of cyan and
yellow, 100% each of cyan and magenta, and 100%
each of cyan, magenta, and yellow).
A set of swatches that make up a four-color
•
black, such as 60% cyan, 50% magenta,
50% yellow, and 100% black.
3 To include a calibration bar in the image, choose
File > Page Setup, and select the Calibration Bars
option. Then click OK.
4 Print the document on a color printer you are
calibrating to.
Calibrating the screen image to
the proof
If you are not using ICC profiles, after examining
the color proof you may need to adjust some
calibration settings to make the image on-screen
exactly match the proof. In particular, you may
need to adjust settings in the CMYK Setup dialog
box to compensate for dot gain, custom ink
characteristics, and color casts.