: CYMK to RGB conversion for repro I'm a photographer and I recently shot a food cook book. We did over 100+ shots. The client asked me for CYMK files with a specific colour profile. We processed

@Si6392903

I will just complement Chris answer.

Retouching should never be done in CMYK*. RGB to CMYK should be the last step in a process.

Converting a CMYK to RGB will never be the same as the original RGB files. The color space is already sqhashed so you will have a dull copy of an RGB file.

RGB file
www.otake.com.mx/Apuntes/RGB-CMYK/Chicos/Rgb.gif
The same RGB file after converted to CMYK and converted back to RGB.
www.otake.com.mx/Apuntes/RGB-CMYK/Chicos/Cmyk-Rgb.gif
*There is a process for correcting skin tones given some CMY values. This correction aslo should be done with the file in RGB mode, but reading the color values as it's equivalent to CMYK.

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@Samaraweera207

This is certainly an odd request, but the most likely explanation is that there is something that the printer doesn't like about your RGB to CMYK conversion so they want to do it themselves. This could be profile related, GCR, UCR, TAC limit, etc. They may think that they are doing you a favour or being polite.

Converting the CMYK files back to RGB is probably OK, but I would be inclined to go back to the original RGB images that you started with and supply them to the printer (after some tweaks if needed). The less processing that the image has been through, the better. Either way, I would suggest that a new proof would be required for sign off before going to print because the images may well look a little different.

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