Graphics Programs Reference
In-Depth Information
data directly in your document and overwriting the original. In addition,
you don't have to wait for Photoshop to process the data as you would
with the Convert to Profile command. Since the printer driver can apply
the conversions as the data is being printed, there is little if any addi-
tional bottleneck.
The downside is that you need to know the rendering intent you
want to use for the conversions so you can set the driver. Depending
on the driver, you may or may not have access to the Adobe ACE CMM
or other features like Black Point Compensation (these options are avail-
able using the Print with Preview command discussed later). In this case
color conversion are being conducted by Photoshop. That means that you
need to decide prior to printing what rendering intent you prefer. With
Convert to Profile , you get to see a preview of the image and pick the ren-
dering intent. All things being equal, using Convert to Profile or Print with
Preview to convert the document will produce the same results. Use
whichever you prefer based on your pipeline.
See Chapter 9, Tutorial #6: “Assign Profile versus Convert to Profile
Command.”
Soft-Proofing
The ability to soft-proof your documents is a tremendous feature of a
color-managed application like Photoshop. Soft-proofing is a term that
describes using a display to produce a preview that accurately shows what
the printed output will look like. This takes a great deal of guesswork out
of editing images for final output. Color management allows us to soft-
proof a document so that we can decide, based upon the output profile,
if the image needs further editing. The soft proof allows us to see how
the gamut mapping of the various rendering intents affects the image,
and shows us how out-of-gamut colors will appear. Photoshop allows us
to set up as many saved soft-proof settings as we wish so it's easy to toggle
from output device to output device.
Soft-proofing is critical for good screen-to-print matching because
until we set up a soft proof for a particular document, Photoshop is
showing us the color based on the current working space. Just because
a user is working on a document in Adobe RGB (1998), that isn't how
the image will appear on any other output device (other than a display).
Therefore, it is critical to set up soft-proofing for RGB documents. CMYK
documents are already in an output color space and they will soft-proof
based upon the embedded profile.
There are situations, however, where you may wish to view a CMYK
document based upon one device but printed on a different device. You
may have a document in U.S. Web Coated (SWOP) v2 CMYK but wish
to see how that document would appear if sent to a press running on a
Euroscale coated press without first converting the document to that print
condition. For those working with CMYK documents, this can be quite
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