When I had my Epson printer I never really used the ABW mode, especially since most of my monochrome prints were toned. I simply printed them as color images using the paper profile for color printing. I am interested in exploring the black and white mode of my new Canon IPG 2000 with third party papers. I gather this can be done by assigning 'printer manages color' in PS and the black and white mode in the Canon driver and using the custom media settings I made in the Media Config Tool for paper feed etc but obviously not the color icc profile. In addition I have seen articles about linearization by making an icc profile from a series of patch readings.
I am a bit confused though about what the best working space for a file to be in before sending it to the printer for untoned black and white prints using the black and white printing mode in the Canon driver. Prophoto RGB, Adobe RGB, Grayscale, Gamma 1.8, Gamma 2.2 etc.
I could use some enlightenment as well as an understanding of why one would be better than the others