Duplex printing color and black on DC250

If I printed a job and left the color mode to CMYK instead of greyscale and the one side of the document is only black text, would the Xerox 250 regard it is black or colour since it usually picks up whether a document is black or color.

 

Black, unless you choose the a full color black or "Rich Black" (my memory could be wrong on the name) under the color settings.

 

Works as you said InterfaceP.. Thanks