In one of my app, the user import a pdf using coregraphics, put some text above it, then print the pdf with the text above. I do all this in the following way:
- select an existing pdf
- create a second pdf containing only the text to print above the first one
- create a pdf with the composition of the two
So my customer has a problem: the background pdf is print as rgb colors and not in cmyk. Is there a way to resolve this?
Core Graphics does support CMYK images, maybe if you convert the image to CMYK first then it will be in CMYK form when the PDF is created. I've not tried this.