Paint.NET :: How To Send PDF Of Project Containing Vignette To Commercial Printer

I want to send a pdf of a project containing a vignette to a commercial printer. Here's the challenge:creating a vignette (I can do this with layers with a gradient from black to transparent)

saving the picture as a pdf

here's the tricky part defining the black as CYMK 40 30 30 100 (not just a straight RGB to CYMK 0 0 0 100 mapping) to give a dark black when printed by a commercial printerPhotoshop express won't export pdfs Paintshop won't either Photoshop will, Will paint.net??

I attach a rough example to show what I mean.

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