Sorry for delay in reply.
When you go to print the image, the print options window pops up. In there is a Printing Preferences button. Click on that and your Epson printer settings come up. Click on Advanced at the bottom and you will see all the options available. Tick the box for "Black ink only" and click OK.
Your printer will now only use the black ink, rather than a mix of the colours to make black. This will then give you a perfect black and white print

. Printing in mix colours seems always give a cast of one of the main colours. I usually get a blue cast
