[Scribus] cmyk workflow

[jon]

>>
>> Settings for CMM are made in "Preferences/Colormanagement"
>> Activate "Colormanagement"
>>

Hi Gustavo,
>
> Consider a document that will be exported to PDF with color intended 
> for
> printer.
>
> What's the difference in the CMYK conversion of an imported RGB picture
> between CM=off and CM=on (with the default settings)?

I don't know wich CM settings are used when scribus is in default mode 
(CM is off) - does this sound confusing?
Simply any color conversion is anyhow managed and done by conversion 
tables or/and algorithms.

If you switch CM on first think different is that you are able to use 
the input profile setting in the pdf output dialog.
(and don't use what is hidden and unknown).
Another is that you are able to set in and output profiles in your 
overall and document settings.
With CM on you can use the Print Preview (though I think it's broken 
and does not display what it should).

Concluding this, if you enable CM your enabling yourself to let scribus 
provide more correct color conversions - if set properly and as long as 
scrbus has no bug here .... or there.

> How do both scenarios compare to the default photoshop RGB-> CMYK 
> conversion?

Different Methods. PS allows to use different CMMs 
(ColorMatchingModules) and provides nearly correct previews on 
calibrated monitors.
photoshop is expensive. You cannot change colormodes in photoshop 
without CM.

Does this answer your questions?
Jon
>
> Thanks
> Gustavo
>
>
>> More generic but possibly more sufficient settings:
>>
>> set profile RGB-Pictures to RGB (ECI-RGB or sRGB or Generic)
>> set profile CMYK-Pictures to CMYK (ISO-coated or ISO-uncoated or
>> Generic)
>> set monitor to (ECI-RGB or sRGB or Generic)
>> set printer to (ISO-coated or ISO-uncoated or Generic)
>>
>> set rendering intents
>> monitor to relative colormetric
>> printer to photographic or perceptive
>>
>> check compensate black
>>
>> You may obtain the mentionend profiles at www.eci.org, for better
>> results you should install them.
>>
>> Using CMM does not mean you wont run into any problems with colors 
>> wich
>> cannot be converted.
>> But it helps a lot.
>>
>> And, no, I am afraid I cannot help you with installing CMM under Linux
>> or Windows.
>>
>> Another way around is to change the colors in your png (in Gimp) to
>> something which in your opinion
>> might be printable. And reimport these files.
>>
>> Jon
>>
>>> Am I doing something wrong here?
>>>
>>> I ought to have it sent and proofed today, so every help is
>>> appreciated :-)
>>>
>>> Best regards
>>> Axel Bojer
>>> _______________________________________________
>>> Scribus mailing list
>>> Scribus at nashi.altmuehlnet.de
>>> http://nashi.altmuehlnet.de/mailman/listinfo/scribus
>>
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>
> -- 
> Angulo S?lido - Tecnologias de Informa??o
> http://angulosolido.pt
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