Hi Ferran.
Thank you to also spend some time to test on your own.
This is indeed a weird result because when the PDF is checked for a PDF/X-4 compliance (whatever the tool used),
an error occurs on it.
The Spot color should be in Lab, Device CMYK or Device gray for the Alternate Color Space and not in Lab according to the last GWG profile for example.
Regards.
Axel
From:
"fpenalver@litografiaroses.com" <fpenalver@litografiaroses.com>
Reply to: "eci-en@lists.callassoftware.com" <eci-en@lists.callassoftware.com>
Date: Friday 10 June 2022 at 11:21
To: "eci-en@lists.callassoftware.com" <eci-en@lists.callassoftware.com>
Cc: Vincent GUILLE <vincent.guille@ubisoft.com>
Subject: [ECI-EN] Re: Spot Colors | Alternate Color Space behaviour | PDF export.
|
You don't often get email from fpenalver@litografiaroses.com.
Learn why this is important |
Hi Axel, hi Peter
Made some tests and I can’t say this is an issue or it is the correct/expected behavior, I am not an expert… but so it is… when you have an object defined with PANTONE (not necessarily defined with CMYK) and you export
to PDF/X-4 with No Conversion, you end up with the Alternate Color Space: ICC Profile – but as far as I know, this ICC profile refers to the
Lab D50 (Adobe) and the Lab values for this separation must be stored somewhere in the PDF because if you preflight the PDF you can read them !!
And as you stated, if you export to PDF/X-4 with Color Conversion (Convert to Destination) you will get the
Alternate Color Space: CMYK and you’ll see the Alternate Color Values for CMYK.
I am sure that someone else will put more light on it ;
Best regards,
ferran
De: Axel Robert [mailto:axel.robert@ubisoft.com]
Enviado el: viernes, 10 de junio de 2022 10:47
Para: eci-en@lists.callassoftware.com
CC: Vincent Guille
Asunto: [ECI-EN] Re: Spot Colors | Alternate Color Space behaviour | PDF export.
Guten Morgen Peter.
Wie geht Es Ihnen ?
Thank you for your quick answer confirming this behavior.
I’m not crazy and that’s a good starting point.
I used a PDF/X-4 export in which no color conversions are allowed, just an output condition name.
I tried with the latest Pantone color swatch library available in In Design and Illustrator aka PANTONE+ Solid Coated.
I exported the complete library in CXF and saw it was possible to obtain a Lab or a RGB (sRGB) file.
So, I don’t know what mechanism Adobe uses for choosing the proper one.
Sincerely.
Axel
From:
Peter KLEINHEIDER <peter@inpetto.cc>
Reply to: "eci-en@lists.callassoftware.com" <eci-en@lists.callassoftware.com>
Date: Friday 10 June 2022 at 10:30
To: "eci-en@lists.callassoftware.com" <eci-en@lists.callassoftware.com>
Cc: Vincent GUILLE <vincent.guille@ubisoft.com>
Subject: [ECI-EN] Re: Spot Colors | Alternate Color Space behaviour | PDF export.
Hi Axel,
I am aware of such an issue.
Usually you get this when
- the spot color is defined with CMYK as "base" color in Indesign
- you use an export setting that tags all colors (e.g. when using the PDF/X-3 export setting)
and I am sure, that there other possibilities as well.
best
Peter