The Canon PIXMA Pro9500 MkII has the same full range of coloured inks as the Pro9000, but adds grey and matte black cartridges. As with Epson printers, the matte black and photo black inks aren't used simultaneously, as the printer switches between the two to suit matte or glossy photo media. The grey cartridge is used in both cases and, while it has the potential to add smoothness to areas of graduated colour, its main use is for black-and white printing.



Link: Techradar