re: postershop and profiles
re: postershop and profiles
- Subject: re: postershop and profiles
- From: David Wollmann <email@hidden>
- Date: Wed, 13 Feb 2002 09:20:07 -0700
- Organization: Luna Vista Imaging
Peter Merck wrote;
>
I just wanted to pass on some observations on using postershop and profiles.
>
>
Postershop will recognize an embedded profile only if it is in tiff format,
>
either CMYK or RGB. If you sent over a PS RGB tiff postershop's pull down for
>
input rgb will list 'use embedded profile', same thing for CMYK. Send over an
>
EPS format and postershop will not list this option.
>
snip
>
So I made a profile from PS6 for swop 20% to use as input but havn't tried it
>
yet.
>
>
This is how I handle things with Onyx PosterShop.... I manage all my
color in Adobe Photoshop, for scans at any rate. I did the same thing
you have just done, I took the default CMYK working space for Photoshop
and saved it off as an ICC profile and then placed that in Onyx
PosterShop's profile folder. I did this when Photoshop 5 first came out
as it seemed that most of the untagged CMYK files I was getting looked
best in the default space. Now since Photoshop 6 is out there, it seems
to be more of a mix and more often I am finding that I like the look of
>
US WEB Coated SWOP< for untagged files.
The way I have my profiles set in Onyx PosterShop is like this; for
Incoming CMYK Images I use my saved off Photoshop profile which I call
PS Standard SWOP, for Vector colors I use the >CS ColorMatch 3.01 SWOP
Sf C< profile which came with ColorSync some time ago. For most Pantone
colors this profile works well, but I get better blues with with the
Onyx supplied profile >DuPont Water Proof.icc< and I get better dark
greens with the Adobe supplied profile >USSheetfedCoated.icc<.
I would vastly prefer using the same profile for both Image and Vector
for CMYK but I have not yet found the >perfect< profile for hitting as
many Pantone colors as possible. There are times when I must use the
Color Replacement feature in Onyx to tweak the Pantone colors. In those
situations I print some small one inch square patches of the PMS colors
I am attempting to match.
For RGB incoming Data I set both Image and Vector to Adobe RGB.
It would be nice to use the feature in PosterShop where it will use the
embedded profile, but as you have found its use can not be relied on.
This is why I control everything outside of Onyx and always send it Tiff
or Postscript files that have already been color managed on the Mac.
Part of my preflight routine, is to open any scan that does not have an
embedded profile, in Adobe Photoshop. I can check my unknown raster
files for embedded profiles with a freeware utility called >Profile Info
CMM< by David Camp Jr., ColorSync AppleScripts will also work, these are
on the Mac System Install Disk. If I have an untagged scan I look at the
file with different profiles using the Assign Profile function in
Photoshop, if the file looks best in something other then my default
space, I assign the new profile then convert to my preferred space. If
possible I'll compare my screen preview to a supplied proof, without a
proof I just rely on my eye for what looks good.
For Illustrator I try to use version 8 as much as I can since I have
issues with version 9, hope to get version 10 soon. I don't think 9
will let you have RGB and CMYK imports in the same file. If I must use
version 9 and I get the message that it is a mixed file, both RGB and
CMYK, the first thing I do is cancel opening the file. Then I double
check my color settings in Illustrator to make sure that the conversion
will handle things the way I want it to. Then I open the file again and
this time I choose what color format I want, RGB or CMYK. Again, I
prefer to manage color first in Photoshop for any Tiff files placed in
Illustrator. If the files are embedded.... all bets are off and you have
to guess.
Vector colors are the hardest to manage, some day I'll save enough
pennies to buy Vector Pro. Using process colors to simulate PMS spot
colors is not fool proof. My understanding is that the process
simulations for the spot PMS colors were based on SWOP, but which SWOP,
which paper? I have half a dozen profiles that use the name SWOP and
each gives me different results. Years ago I would see different process
color mixes for a conversion of a PMS spot color to CMYK in Illustrator
and Quark. The same PMS but a different CMYK mix for the two
applications. At least standards have improved.
I would love to have a profile that would match every process simulation
in the Solid to Process PMS guide book, but such a beast does not seem
to exists, plus I think the CMM in Onyx PosterShop must have some
unwanted, or unknown to me, influence on how it renders vector colors.
Plus my inks are not SWOP and therefore I can match a different
collection of PMS colors, some match better, others not so nice.
I scan all my work in Adobe RGB, and as stated earlier, PosterShop is
setup to receive incoming Adobe RGB, this works great. If I like my scan
on screen I'm going to love it on paper.
Now all I want is the same thing with vector colors.
Good Luck....
David Wollmann.
Luna Vista Imaging.
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