Re: Photoshop 6 changing Illustrator colors
Re: Photoshop 6 changing Illustrator colors
- Subject: Re: Photoshop 6 changing Illustrator colors
- From: Chris Murphy <email@hidden>
- Date: Thu, 11 Apr 2002 15:47:14 -0600
Mark Burgess <email@hidden> writes:
>
You'd think so, but if I have PS6 set to SWOPv2, Photoshop
>
re-interprets 100%K from Illustrator (8) as a gray.
Well I just tried it with Illustrator 10, taking a CMYK test TIFF and
placing it into a CMYK illustrator document, and making a few C, M, Y and
K shapes with 100% each respectively. I saved it both as illustrator 10
EPS and Illustrator 8 EPS, and brought it into Photoshop 6 as a CMYK
image in the Rasterize Generic EPS dialog box - and I end up with exactly
the same values as I put into the document.
>
I have heard that before, but can't find anyone who agrees with it.
>
If I show a 4/c magazine ad point to the type, and ask what color it
>
is, everyone says "black."
SWOP black ink is still called black because it is black, but it's not
that black. It has an L* value of around 12 on #5 groundwood.
>
There's no reason for PS to re-interpret 100%k as a gray,
>
regardless of how "light" SWOP black is: 100% SWOP K should be 100%
>
SWOP K in every program. Interestingly, "Adobe Photoshop 6.0 Studio
>
Techniques," page 215, shows 100%K as being just as dark as rich
>
black. Anyway...
Something is probably converting the EPS. As for Photoshop 6 Studio
techniques: a.) it's not a SWOP job on #5 groundwood; b.) the printer
could have been using a really dark black ink for the book; c.) Ben has
told me that it's possible the 100%K only square isn't really 100%K only.
Regardless, I can tell you that 100%K only is lighter than rich black
when it comes to SWOP.
>
Ahh, but Photoshop is in RGB mode, not CMYK. So I'd expect the RGB
>
color to stay as-is. So far I've had absolutely no luck in
>
rasterizing Illustrator 8 RGB in Photoshop 6. I have tried the demo
>
version of Illustrator 10, and with the out-of-the-box settings it
>
has the same problem. If I switch both it and Photoshop the Web
>
Defaults settings the colors don't change. I guess we now have a
>
reason to upgrade. :-|
Wait a minute. These are RGB EPS files from Illustrator? I'm confused. If
you create a CMYK document in Illustrator and make a shape with 100%
black,and rasterize it in Photoshop as CMYK, you will get the same CMYK
values. If you are incorporating RGB anything into this, THAT is probably
part of the problem.
If 100%K SWOP is being converted into RGB, and then is being converted
back into CMYK (through the info palette or an actual conversion on
open), then that's why you aren't getting 100%K only when opening the
document in Photoshop.
Chris Murphy
Color Remedies (tm)
Boulder, CO
303-415-9932
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