Most Photo quality inkjet printers can produce realistic looking b/w prints. Although Inkjet printers have a dedicated Black, they use a combination of all the colours to achieve monochrome, see the above sample, the Black is primarily used for text printing. One of the problems of using all the colours is that you invariably introduce a colour cast, magenta or green casts seem to be the most common. These casts are small and in most cases you probably wouldn’t notice them. However, for the perfectionist there are a number of solutions.
Dedicated monochrome items
Companies such as Lyson and Piezography produce a set of dedicated inks that replace the normal colour ink set (most Epson photo printers are compatible). The inks eliminate any cast or give the option for creating toned prints. The one major drawback is that you have to have a dedicated printer for the task, once you have loaded your ink set then you can’t use the printer for colour printing.