Did any of the colors come in with placed files (for instance, from Illustrator)? If so, those colors would need to be edited in the original placed image(s).
How are you printing? On a desktop printer? Are you sending to a commercial printer?
When you export a PDF (File > Export > Adobe PDF (Print)), some export formats preserve colors (e.g., High Quality Print and PDF/X-4), while others convert RGB to CMYK (PDF/X-1a). Which preset you use depends on how you're printing the InDesign file. Most desktop printers and more modern commercial printing RIPs (raster image processors) don't require that you convert colors. Old RIP technologies may require choosing a preset like PDF/X-1a which converts RGB to CMYK.
Spot colors can be converted to process on output if you open the Ink Manager and check the box to Convert All Spots to Process (and you'll get better results if you also check the Use Standard Lab Values box). You'll also want to specify a CMYK destination profile under the Output section in the export dialog.
Yes, some of the Pantone colours that I don't manage to convert from LAB to CMYK in InDesign originally come from placed files.
I've managed to convert some of the Pantone colours till CMYK some of them won't be edited.
If you want to manually change a Pantone+ swatch to CMYK, you would have to also change its Color Type to Process—if you change the Color Mode to CMYK, but leave the Type as Spot it would still export as an extra separation plate unless you follow Peter's suggestion of converting spots via Ink Manger.
Which ever method you use the spot color is converted into your document's CMYK space (the document's assigned CMYK profile), so even if you export to PDF/X-4 where there's no color conversion the color will still be document CMYK. If you choose something other than your document's CMYK space as the destination on export, you would get an additional conversion into that space.
If you don't really intend to print spot colors you could also consider using Pantone+ Color Bridge, which are defined as Pantone's recommended process CMYK simulations of the solid ink colors.
I'm sending my file to commercial printer. They wanted PDF/X-4 but when I do so I get an error message concerning OPI. Therefore I've used the High Quality print.
In my Ink Manager, only the four CMYK colors appear, the other colours in the document are not visible there. I don't know how to get them to show there, unfortunatelly.
the other colours in the document are not visible there
Ink Manager only shows process and spot colors, so if it's only showing CMYK in the list you don't have any spots to convert.
You probably need to solve this OPI issue. If they demand PDF/X-4, regular PDF is not a substitute.
What is the specific message about OPI? There should be no OPI in anything today, it's an old and obsolete thing, but still ready to cause problems if it sneaks in.
I seem to recall that the PDF/X-4 preset requires that all images be embedded.
It sounds like you may have OPI turned on somewhere. OPI requires image replacement on the RIP, as I recall. If I choose PDF/X4 and look at the Advanced panel the OPI options are grayed so I'm not seeing how you're getting that message.
Have you tried restoring your InDesign preferences?
Well, I changed all the colors in the swatch panel to process colors so the CMYK thing seemed to be solved.
In the Advanced panel for PDF export I'm able to click Exclude OPI for EPS, PDF and Bitmap. I don't really know what OPI is but the error message I get says that one or many of the placed files contains OPI information.
Sorry for my ignorance, but I'm new to InDesign.
You may have in your project some very old files that were designed for an early workflow called Open Prepress Interface (OPI):
I believe that workflow is rarely used any more. It originated when computers and workstations were much more limited in memory and storage space.
Last time I used Quark it was still the default to include OPI comments when linking images, and most Quark users are blissfully unaware of it. Odds are good that you've got a placed Quark PDF or EPS.
The good news is that Preflight should have a link to take you directly to it. If it's a PDF, I believe you can remove the OPI comments as one of the fix-ups in Acrobat's preflight tools.
Peter is correct. In InDesign Preflight panel, when defining a Preflight Profile, include LINKS > OPI Links
In Acrobat Pro, in the Print Production panel, in Preflight, create a fix-up for Discard OPI Information.
Ok, I'll try to do that.
Thanks for all the support and help!
Test Screen Name wrote:
There should be no OPI in anything today, it's an old and obsolete thing, but still ready to cause problems if it sneaks in.
FYI: The company that I work for uses a RIP workflow from ESKO that uses OPI, and it isn't an old system.
The prepress department receives PDFs from the client and they are dropped into a hot folder which generates a low-res pdf for placement (A), a hi-res pdf for OPI (B) and a second low-res pdf for viewing at the press for proofing (C). The A pdfs are placed into InDesign to create imposition flats. They are then exported from InDesign as pdf that is dropped into another hot folder that swaps out the A for B behind the scene, sends it all to the RIP and then on to the platesetter. From the perspective of the prepress, we only have to deal with the A pdf, so it isn't really that different from a non-OPI workflow. InDesign doesn't even know it's going on, because all the OPI is done in the RIP after InDesign is done with it's part of the process.
That's not the thrust of the way OPI is being talked about in this thread, but I wanted to give some perspective to your statement, which I mostly agree with, by the way. Cheers.
OPI, when properly set up and used in a disciplined way, has always been pretty much trouble free. One could argue, in fact, that OPI forces a discipline about where graphics are put which is good for the organisation, for problem solving, and reducing errors. But the popular view is that OPI was invented at a time when computers were much less powerful than your oldest phone, and networks hardly better than string and tins. That therefore OPI is absolutely not needed by anyone these days. It's not much of a step from that to "obsolete" since people are happy to declare obsolete anything that is just a little unfashionable, no matter how useful. I think it is likely that what support currently exists in products will quietly be dropped -- InDesign does have to know about it to the extent of carefully preserving OPI references in placed PDF.