Soft Proofing and Gamut Warning

As we have already mentioned, a printer may not be able to reproduce all the colors in an image accurately if it has a smaller gamut than the image. All color management can do is help the printer create as accurate an impression of the original image as possible. If you check your image on a monitor before printing ("soft-proofing"), the image will be implicitly converted to the printer's color space for viewing using the printer's ICC profile. This will help you to avoid producing costly and disappointing test prints, a step that is especially important for large-scale commercial print runs. No one wants to produce a print run of 2,000 books with poor quality photos. To proof accurately, your proofing device has to be able to produce all the colors that your output device can produce - and this is not always the case if you are proofing a modern inkjet printer on a monitor.

To set up soft-proofing in Photoshop, select View r Proof Setup r Custom. The dialog in figure 3-32 will appear.

Select the profile of the printer you want to simulate (®) and make sure ** Or printer type, in the case of offset or you select the correct printer profile,** paper type, ink type, and printer rotogravure printing settings. Leave Preserve RGB Numbers (®) unchecked. Select the rendering intent (©) you will be using later for printing or profile conversion (section 3.3, page 68). This will be either Perceptual or Relative Colorimetric if you

Activate Black Point Compensation © and Simulate Paper Color © (see figure 3-32). The latter will also automatically activate Simulate Black Ink

If you want to soft-proof regularly, save your proofing settings and give them a name that includes the simulated printer, the paper, and printer settings.

To activate soft-proofing, select View r Proof Colors (or press ^^-[y]/ g-(T]). This keystroke toggles proofing on and off. Leave it switched off while you are optimizing your images.

After setting up soft-proofing, you can also activate Gamut Warning (View r Gamut Warning or Q-K-fYl/Q-^-ITI).

With Gamut Warning active, Photoshop will mark all areas in your image that use colors that are out-of-gamut for your target color space. The default warning color is gray (figure 3-33), but this is easily overlooked, so we recommend setting the warning color to a loud, saturated magenta that doesn't usually occur in photos.

To set a new gamut warning color, select Edit r Preferences r Transparency & Gamut. Click on the Color field to display the color picker (figure 3-34).

are printing photos.

Customize Proof Condition

Custom Proof Condition: I Custom Proof Conditions

A --\0: :■:■. .-. IJU.1'. . S ■ .i. 1.1 • J.-Ij uY, i-

^Simulate Black Ink

Figure 3-32: Proofing setup in Photoshop

0 0

Post a comment