On Tue, 23 Oct 2018 01:30:48 +0100, nospam wrote:

In article , Jim Wilkinson Knife
wrote:
Just noticed, if I print from Excel, it only uses black. But if I print
something similar from a photo program, it uses colours, even thought the
output is identically black. Excel is therefore a lot faster to print.

Excel can be set to print in a mix of colours.

My point was Excel manages to tell the printer to just use black, which is
sensible, and the output is excellent.

except when the spreadsheets and charts use colours, in which case it's
neither sensible nor desirable.

It doesn't do that. If the text is black, it uses black, if the text is coloured, it uses colours. Yet my photo editor, with the same black text, uses colours!

But photo editors won't, even when
only black and white are present in the image.

as you've been told (and ignored), photo black requires cmyk, however,
that can be disabled, with substandard results.

Clearly not as I've proved with Excel.