[Scribus] color gamut

[Florence Gaillaguet]

Hi,

I have changed the ICC profiles with my monitor for RGB and Fogra27 for
CMYK. I have no warning sign anymore. : )
Color management is still mysterious to me... (as well as english
abbreviations ; ) )
So, I really appreciate your help.

Thanks a lot.

Florence

On 4/27/06, PLinnell <mrdocs at scribus.info> wrote:
>
> Salut Florence,
>
> On Thursday 27 April 2006 10:49, Florence Gaillaguet wrote:
> > Hi,
> >
> > I have chosen 5 colors in a Pantone booklet, called my printer to
> > get the CMYK values and created them with Scribus. A red triangle
> > has appeared in the color menu : does this mean that the color are
> > out of gamut ?
>
> Possibly. Possibly not.  These are a *warning*. The ICC specs do not
> define exactly how this works, so it is a 'best guess' based on the
> printing profile. The other variable is paper density and brightness.
> High gloss paper often has better gamut, as it can absorb more ink
> per sq/cm
>
>
> > What are the consequences of that ?
>
> If you are printing CMYK, the ink combo might be outside of a given
> profile's gamut and depending on the rendering choice, there could be
> what we call gamut compression, where two close but not matching
> shades are merged into one.
>
> When printing images, you could lose detail in shadows or certain
> shades may not have the same vividness or deepness.
>
> > Is it just a problem with my color management settings (ECI rvg &
> > Iso Coated) ?
>
> None at all. Just make sure Scribus is using a monitor profile for
> your monitor, not a generic RGB one.
>
> >
> > These are the CMYK :
> > Dark red : 0 95 100 2
> > Dark green : 34 0 81 71
> > yellow : 0 18 100 0
> > orange 0 42 100 7
>
> Plugging these numbers in with Fogra-27 coated shows no warnings, but
> I think the getting the exact deep green and *exact* shade of red
> might be tricky.
>
> Using similar shades on a project coated stock did not pose a problem
> and I was very pleased with the results. The deep green was well
> saturated and the red was really really close.
>
>
> >
> > Thank you for your help
> > Florence
> Hope that helps,
>
> Peter
>
>
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