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How can I do this easily from any application? Or, how else might I configure my printer to print using only black ink? I suspect that if I can convert the image to pure black and white with dithering (no grey) then the printer might then use only the black ink. To prove this I scanned a printout at 600dpi and got the following in what looked like a light-grey part of the page:
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I have a Canon printer and I have selected the 'Black & White' option from the print dialogue, but the result is that it prints in grey-scale, and the greys are rendered using the colour inks. I'd like to routinely print using only black ink when colour isn't important, because I have a whole lot more black ink than colour ink.
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