Cross stitch by hand? Is the chart in symols or colour? I think you will need a range of shades from black to white. It should look stunning when you have finished. Have you thought of using sepia shades? That gives a nice soft look to the protrait.
thanks for replying. It's a chart I "generated" myself... And I'm a little worried because it might be easy to get confused ,as the difference between shades of same colour can be subtle... So I'd like to use minimum of colours. And I wanted to know if any1 here ever did b&w portraits... :}