Color Output From Frame
Jacob Schäffer
js at grafikhuset.dk
Fri Feb 29 00:32:12 PST 2008
Framers,
Unfortunately I mentioned in the second paragraph the additive and subtractive color models backwards.
RGB is the *additive* model, based on the addition of luminous colors. CMYK is a subtractive model, based on the absorption (subtraction) of complementary colors from (nominally) white light by pigments or inks.
Thanks to Fred Ridder pointing out my typo.
Best regards
Jacob Schäffer | Chief Developer
Grafikhuset (House of Graphics)
Paradis Allé 22, Ramløse
DK-3200 Helsinge, Denmark
Phone: +45 4439 4400
Email: js at grafikhuset.dk
Web: www.grafikhuset.net/publipdf
> -----Oprindelig meddelelse-----
> Fra: framers-bounces at lists.frameusers.com
> [mailto:framers-bounces at lists.frameusers.com] På vegne af
> Jacob Schäffer
> Sendt: 28. februar 2008 21:56
> Til: Frame Users
> Cc: Mike Wickham
> Emne: RE: Color Output From Frame
>
>
> Framers,
>
> Framemaker 8 still rely on the Windows GDI or GDI+ kernel as
> most Windows applications do. This approach has a fantastic
> benefit: Speed. Especially speed in regard to application performance.
>
> Windows GDI or GDI+ are RGB or sRGB devices. This mean that
> Windows in general will work in 3 component subtractive color
> spaces such as RGB instead of 4 component additive color
> spaces such as CMYK. Although it's possible to configure
> color management in Windows you will NOT be able to define a
> CMYK color in Framemaker that will preserve its CMYK values
> as you defined them downstream. Even more impossible it would
> be to preserve SPOT colors as you define them.
>
> I have developed a solution that works fantastic in regard to
> precise *repair* conversion. It's called Grafikhuset Publi
> PDF with optimizer plug-in
> (http://www.grafikhuset.net/publipdf/tech_components_optimizer
> _plugin.html).
>
> However, I wouldn't dream of selling it to users that are
> satisfied with the Distiller built-in 'Convert All Colors to
> CMYK', since such users are simply not demanding enough in
> regard to color fidelity to qualify as Publi PDF Optimizer
> users. Such users automatically accept that a CMYK definition
> in Framemaker will be totally molestrated by conversion
> processes they don't control. Fine with me, but bear in mind
> that automatic CMYK -> RGB -> CMYK conversions are quite
> lossy, especially with colors that originally contained a
> Black component. In practise this K component will often end
> on the Y plate, but what the heck, it's CMYK :-)
>
> If you can live with that feel free to do so!
>
> The thing is, that CMYK or SPOT colors defined in Framemaker
> will print as RGB and the Distiller built-in 'Convert All
> Colors to CMYK' will POTENTIALLY not bring back the *correct*
> CMYK values and DEFINITELY not the SPOT color values -- not
> even their CMYK counterparts.
>
> Grafikhuset Publi PDF is a quite expensive, but extremely
> reliable and fast solution to this specific color problem.
> With Grafikhuset Publi PDF you can setup color maps that
> *precisely* converts the Framemaker/GDI generated RGB to CMYK
> or SPOT as you originally defined in Framemaker and/or any
> imported EPS art (be careful with imported PDF art -- you may
> loose SPOT colors on-the-go).
>
> To understand the problem better, please see my article on
> the subject »Difficult PDF documents in prepress«:
> http://www.grafikhuset.net/publipdf/whitepaper_difficult_pdf_d
> ocuments.html
>
> To download a fully functioning 30-day live trial:
> http://www.grafikhuset.net/publipdf/download.htm.
>
> Quite a few Publi PDF users already monitor the FrameUsers
> e-mail list. Feel free to speak up with your track
> record/experience with Grafikhuset Publi PDF.
>
>
> Best regards
> Jacob Schäffer | Chief Developer
> Grafikhuset (House of Graphics)
> Paradis Allé 22, Ramløse
> DK-3200 Helsinge, Denmark
> Phone: +45 4439 4400
> Email: js at grafikhuset.dk
> Web: www.grafikhuset.net/publipdf
>
>
>
> > -----Oprindelig meddelelse-----
> > Fra: framers-bounces at lists.frameusers.com
> > [mailto:framers-bounces at lists.frameusers.com] På vegne af
> Mike Wickham
> > Sendt: 28. februar 2008 18:32
> > Til: Scott White; Frame Users
> > Emne: Re: Color Output From Frame
> >
> >
> > > Has Framemaker 8 made any advances in color output for Framemaker
> > > pages?
> >
> > Sadly, no.
> >
> > > Second, has anyone discovered any new ways to create color
> > output from
> > > Framemaker
> > > without having the printer giving you the, "these colors
> > are rgb, ......"
> >
> > Is it graphics you are having problems with? If so, save them
> > as .EPS files.
> > When FrameMaker creates PostScript for distillation it passes
> > everything
> > through the Windows GDI. This converts graphics back to RGB.
> > The exception
> > is for .EPS files, which are passed around the GDI as is.
> > CMYK will stay as
> > CMYK. So I recommend that you use only .EPS format for
> graphics files.
> >
> > Also, in maker.ini, try this setting:
> GetLibraryColorRGBFromCMYK=None
> >
> > You may also have an improper color management setting in Distiller.
> > (Distiller also offers a "Convert All Colors to CMYK"
> > option.) I seem to
> > recall that having "Tag Everything for Color Management"
> > caused plain black
> > text to go multi-ink!)
> >
> > The preflight capability of Acrobat Pro can help you find RGB
> > problems.
> >
> > Mike Wickham
> >
> >
> >
> >
> > _______________________________________________
> >
> >
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> khuset.dk
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