Thomas
I noticed sometime ago that Duotones produced in photoshop 5 were very
much influenced by the default CMYK chosen at the time of making. I'd
updated to Photoshop 6, but I eventualkly discovered that if I chose my
old Photoshop 5 CMYK as default - then the appearance was corrected. it
wa sa scary moment.
I think converitng duotones to RGB is the best way if you're using a
Quickdraw pipeline but of course it loses the re editing ability and -
of course it doesn't help here.
Could the default CMYK in Photoshop when the old files were produced be
somehow associated with the file produced? I won't say emnbedded, but
an EPS? could there be something in the file?
And if the new duotone was made with a diffferent setup CMYK perhaps
that's part of the story. Can you get the actual duotone files, or only
the EPS's?
How about reverting to that older version of Photoshop and looking at
both old and new Duotones, I wonder if they look different? [if you
have them]
What I'm suggesting is that since duotones in photoshop 6 and 7 were
somewhat dependent on CMYK default for their appearance, [although
there was no facility to embed that settting] I think that this may be
one avenue worth exploring?
maqybe they fixed it in photoshop 7 but that makes it more complex to
deal with now.
On Thursday, February 27, 2003 at 10:30 pm,
Thomas Holm / Pixl, listservermail-at-pixl.dk, wrote:
> A client prints a lot of duotones (real duotones with Black and a Pantone
> colour) and (tries to) proof them on a Canon CLC1000.
>
> He generates the Duotones (say a blue one) in Photoshop and prints it as
> usual in PS 7 using the custom proofer profile, and get blue results, not
> unlike the final offset print. When he places the same duotone (saved as an
> EPS) in Quark he'll get purple prints. As Quark can't handle Colour
> management with EPS files this is sort of to be expected, BUT...
>
> Some time ago in another version of Photoshop (with unknown settings) he
> generated duotones as well. Now when he placed these duotones in Quark 4
> they WERE blue, and the printout was very similar to the one obtained in
> Photoshop.
>
> When opened in Photoshop both old and new duotones look and print about the
> same. If both are placed in the same Quark DOC, one is blue and one is
> purple.
>
> Quark 5 has been set up to try and use profiles, and CMS off and what have
> you. Photoshop files are printed using the standard Print Space window.
>
> The client of course prefer the old style way of working (no CMS where the
> colour match) for Duotones, but like the accurate colour when using a
> printer
> profile.
>
> So the questions are:
> Exactly what factors are involved when creating a Duotone in Photoshop an a
> Mac running OS 9.2.
> ColorSync control Panel?
> RGB or CMYK setup?
> CMM?
> What else?
>
> Have something changed in the encoding changed between PS 6 and 7?
>
> I've tried a myriad of options in both PS and Quark, but not matter what I
> come up with, Quark prints all my supposedly blue files as purple, but all
> the clients old duotones print like they should - blue.
>
> As this happens even when you place these two files in the same Quark doc
> (old is blue, new is purple), it must be something in the way the duotones
> are created between PS 6 and PS7 that makes the difference.
default CMYK influence?
I tried opening my old Duotone in Ps7, no mattter what CMYK I set as
default it looks wrong, so I'm sure something has changed betweeen
versions.
perhaps a bit of a clue but not much help really?
Regards, NeilB
colourmanagement.net :: Consulting in Imaging & Colour Management
custom scanner and printer profiles, training on Trident & Imacon Scanning
supply Gretag and eyeOne, ICS basICColor series, XRite, OptiCal
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