[Problem] ROMM RGB ICC-profile turns image grey when converting to PDF

[STL]

Hi there, 
I hope someone can help me with this as I admittedly do not have a lot of experience with ICC-profiles and color management. 

I am in the processing of preparing my pictures to be uploaded to a print on demand site.
The site requires that the pictures have a ISO 22028-2 ROMM RGB profile and are in PDF.

While converting the image in GIMP 3.0.1-1 to the ISO 22028-2 ROMM RGB profile goes well enough, when I export my image to PDF, the image becomes quite greyed out / looses saturation. 

I do not know whether this is a GIMP, export settings, or ICC issue, and if anyone can recommend a solution, workaround or use of another programme to succeed, I would appreciate it greatly. 


Thank you in advance  

[rich2005]

(9 hours ago)STL Wrote: Hi there, 
I hope someone can help me with this as I admittedly do not have a lot of experience with ICC-profiles and color management.

It is worth mentioning Krita which has more colour tools, for example comparing the gimp.icc with the ROMM icc which has a wider profile. This will account for a colour change, as they get stretched into the envelope.

   

Quote:I am in the processing of preparing my pictures to be uploaded to a print on demand site.

Quote:The site requires that the pictures have a ISO 22028-2 ROMM RGB profile and are in PDF.

That is a bit strange, usually the printing company asks for a  RGB image or a CMYK PDF (not both) You can embed a RGB image in  a CMYK PDF using Scribus but that is not your requirement.

You can export your image as a PDF and no real way of knowing if the ROMM icc is used.  

Quote:While converting the image in GIMP 3.0.1-1 to the ISO 22028-2 ROMM RGB profile goes well enough, when I export my image to PDF, the image becomes quite greyed out / looses saturation. 

I do not know whether this is a GIMP, export settings, or ICC issue, and if anyone can recommend a solution, workaround or use of another programme to succeed, I would appreciate it greatly.

It is a function of the icc and colour management. Nothing you can tweekn (except change the colours) , generally a print loses some of the brighter colours compared with a non-calibrated computer display.  That ROMM profile is not the worst by any means.

As an experiment, open your image with the ROMM profile and go into View -> Color Management -> Color Manage This View  Toggle that on/off and look for changes. One screen display and other is print display.