This community has been of great help no end thus far.
For my booklet, i would say 90% of the layout is images created in Illustrator. What is best practice here for scans or images which have been screen printed or ar basically RGB?
I am unsure whether it is worthwhile converting images to CMYK in photsohop and then playing with them in Illustrator and then finally placing in Illustrator because of the following:
Why do this if on "export PDF" i can use press settings. Would this not convert EVERYTHING in my Indesign booklet to CMYK ready material???
I'm unsure what to do?
The only reason you might want to convert to CMYK before export is if, and this is the most important factor, you already know the correct output profile for the device on which this will be printed and you will NEVER want to repurpose the art for another device, and if you want to be able to tweak the image and sharpen after conversion.
If all you were going to do in Photoshop is convert to CMYK, and not do addtional edits after, there is no advantage, at all, to doing that over converting on export from ID.
Would do the same... When I have to change or modify the images I always work in CMYK. Otherwise I use RGB for screenshots etc. and convert the PDF to proces colours. 2 years ago I would always automate the RGB to CMYK images also other prgrams formaking lay-out. Then I never use RGB in Prepress jobs. With ID it works very good and without any problems untill now.