How Can I Check if I Have RGBs in my Design File?

[GerardA1969]

I have a 424 page book with hundreds of photos in it. Is there a way that I can easily find out what page images appear that are not CMYK? I need to know this so that I can convert them from RGB to CMYK for prepress. With so many images I'm sure to miss a few if there is no easy way to figure this out. Help please!

[Derek Cross]

Leave the images in RGB color mode.

[GerardA1969]

My printer who is manufacturing my book says that all images must be converted to CMYK.

[Frans v.d. Geest]

Wow, does your printer never heard of colour management? Create the PDF and use the profile for the correct press, any printer should know that, and if not he/she hasn't educated him/herself for at least 15 years... Choos another printer would be my advice.

[rob day · Accepted solution]

It is not uncommon for printers to request all CMYK PDFs. The easiest way to do that is set the Destination in the Output tab to the printer’s CMYK output profile, which you should have assigned to your InDesign document.

Here I’m exporting a PDF/X-4 PDF to my document’s CMYK profile Coated GRACol 2006. In this case all placed images and objects that are not already in the Coated GRACol CMYK space will get correctly converted to the final print destination. It is more efficient to place RGB images and make a uniform conversion from the Output tab rather than doing it in Photoshop.

[Derek Cross]

Has your printer asked that you supply a PDF of the book for the printing and, if so , has s/he specified which kind?

[Laubender]

Hi Gerard,

you could use InDesign's Preflight feature for this.

Preflight Profile > Color > Color space not allowed

More details:

https://helpx.adobe.com/indesign/using/preflighting-files-handoff.html

Also: Add a column in your Links panel for color space.

Sort by color space as next step.

Regards,
Uwe Laubender

( ACP )