Tutorials - Color Management for Photographers - page 398

generation goes lower, more CMY inks are being used. Also,
notice that the name of this custom CMYK color is updated in
the top field. Photoshop automatically appends the black
generation setting for you.
4. Once you have investigated the behavior of the Custom
CMYK dialog with regard to altering the Black Generation
pop-up, set the Black Generation pop-up to None and click
OK . Note that if we wanted to save this setting out as an ICC
profile, we could do so by once again clicking this CMYK pop-
up menu and selecting Save CMYK . We could use the default
name provided by Photoshop and save the profile to disk. Since
we can use the current settings for conversions and we likely
will not use them again, we do not need to save these
conversions as ICC profiles. Accept these new Color Settings by
clicking OK in the Color Settings.
5. Open Printer_Test_File.tif found on your CD. If your Color
Settings are such that you get an Embedded Profile
Mismatch , pick the radio button Use the embedded profile
(instead of the working space) to preserve the color space of
the document, thus allowing the document to open in
ColorMatch RGB, which is the original color space of this
document.
6. Choose Image-Duplicate and when the dialog appears, name
this new document GCR None , and click OK .
7. The CMYK setting built in step 4 can now be used to produce
an RGB-to-CMYK conversion using None (no) GCR . Although
we didn't save out this setting as a custom CMYK profile,
Photoshop will still allow us to access this using Convert to
Profile command.
Choose Image-Mode-Convert to Profile in Photoshop CS
or Edit-Convert to Profile in CS2 as seen in Fig. 9-14-3.
From the Profile pop-up menu select SWOP (Coated),
20%, GCR, None which is the CMYK conversion method you
produced in step 4. It will be loaded toward the top of the
Destination Space Profile pop-up menu ( Working CMYK ).
From the Engine pop-up menu, select Adobe ACE .
From the Intent pop-up menu, select Relative Colorimetric .
Have Use Black Point Compensation and Use Dither check
boxes on.
Be sure the Preview check box is on.
Click OK .
The image is converted to CMYK with no GCR. Note that we
could have also used the Image-Mode-CMYK command to
apply this conversion, but I want you to get in the habit of
using the Convert to Profile command.