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Q: 

PDFContext and Registration color

Hello. If there a way to set the "registration color" (all components 100%) in the CGPDFContext? Context deals with this color in source and target documents (I can open a PDF, re-save it and registration color is preserved), but I can't find a way to draw a line or fill a rect with this color.

I have played a lot with NSColor and color spaces, my first guess was simple CMYK (1,1,1,1), but neither this nor any other my idea succeeded.

Any help is appreciated, I'm really stuck with it.

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