[Framers] Overprint Not Working in FrameMaker 10 and Acrobat Pro 2017

[Mike Wickham]

I set all four colors (CMYK) to process and overprint. Using Save as PDF 
(not print to Adobe PDF).

Below, you can see the PDF with all four plates turned on in Output 
Preview. It is easy to see that yellow is overprinting. It turns green 
on top of cyan, and  easy to see that black is, too-- although not so 
much in this GIF. The black is darker over the cyan, wit the "E" showing 
in two colors, as expected with overprinting. The cyan and magenta 
plates, though, are not correctly overprinting and have letters of 
unchanged color where they are supposed to overprint:

CMYK

Below is the PDF with the black and yellow plates turned off. You can 
see that they were overprinted. The full cyan plate remains:

CM plates only

Below is the image with the magenta plate turned off. You can see that 
it knocks out the cyan plate, even though all colors are set to overprint:

CYK only

And below is the cyan plate turned off. It knocks out the yellow plate, 
even though all colors are set to overprint:

MYK only

So there is definitely some error in the process. Overprinting works 
with black and yellow plates, but not cyan and magenta. The Object 
Inspector in Acrobat works similarly to your Quite Revealing. It 
accurately shows what the PDF presents, i.e. overprint=true for black 
and yellow, but false for cyan and magenta. I confirmed this by printing 
to a Xerox Phaser CMYK printer to be sure it wasn't a display artifact.

I cannot figure out why overprints are only flowing to the PDF for two 
of the four plates! All four color definitions are set to Process 
Overprint in FrameMaker.

Mike Wickham