Adobe photoshop cs2 사용자 설명서
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ADOBE PHOTOSHOP CS2
User Guide
Specifying overprint colors
Overprint colors are two unscreened inks printed on top of each other. For example, when you print a cyan ink over
a yellow ink, the resulting overprint color is green. The order in which inks are printed, as well as variations in the
inks and paper, can significantly affect the final results.
a yellow ink, the resulting overprint color is green. The order in which inks are printed, as well as variations in the
inks and paper, can significantly affect the final results.
To predict how colors will look when printed, use a printed sample of the overprinted inks and adjust your screen
display accordingly. Keep in mind that this adjustment affects only how the overprint colors appear on-screen, not
when printed. Before adjusting these colors, make sure to calibrate your monitor.
display accordingly. Keep in mind that this adjustment affects only how the overprint colors appear on-screen, not
when printed. Before adjusting these colors, make sure to calibrate your monitor.
To adjust the display of overprint colors
1
Choose Image > Mode > Duotone.
2
Click Overprint Colors. The Overprint Colors dialog box shows how the combined inks will look when printed.
3
Click the color swatch of the ink combination that you want to adjust.
4
Select the desired color in the color picker, and click OK.
5
Repeat steps 3 and 4 until you are satisfied with the ink combination. Then click OK.
Saving and loading duotone settings
Use the Save button in the Duotone Options dialog box to save a set of duotone curves, ink settings, and overprint
colors. Use the Load button to load a set of duotone curves, ink settings, and overprint colors. You can then apply
these settings to other grayscale images.
colors. Use the Load button to load a set of duotone curves, ink settings, and overprint colors. You can then apply
these settings to other grayscale images.
Photoshop includes several sample sets of duotone, tritone, and quadtone curves. These sets include some commonly
used curves and colors. Use these sets as starting points when you create your own combinations.
used curves and colors. Use these sets as starting points when you create your own combinations.
To view the individual colors of a duotone image
Because duotones are single-channel images, your adjustments to individual printing inks are displayed as part of
the final composite image. In some cases, you may want to view the individual “printing plates” to see how the
individual colors will separate when printed (as you can with CMYK images).
the final composite image. In some cases, you may want to view the individual “printing plates” to see how the
individual colors will separate when printed (as you can with CMYK images).
1
After specifying your ink colors, choose Image > Mode > Multichannel.
The image is converted to Multichannel mode, with each channel represented as a spot color channel. The contents
of each spot channel accurately reflect the duotone settings, but the on-screen composite preview may not be as
accurate as the preview in Duotone mode.
of each spot channel accurately reflect the duotone settings, but the on-screen composite preview may not be as
accurate as the preview in Duotone mode.
Note: If you make any changes to the image in Multichannel mode, you can’t revert to the original duotone state (unless
you can access the duotone state in the History palette). To adjust the distribution of ink and view its effect on the
individual printing plates, make the adjustments in the Duotone Curves dialog box before converting to Multichannel
mode.
you can access the duotone state in the History palette). To adjust the distribution of ink and view its effect on the
individual printing plates, make the adjustments in the Duotone Curves dialog box before converting to Multichannel
mode.
2
Select the channel you want to examine in the Channels palette.
3
Choose Edit > Undo Multichannel to revert to Duotone mode.
Printing duotones
When creating duotones, keep in mind that both the order in which the inks are printed and the screen angles you
use have a significant effect on the final output.
use have a significant effect on the final output.