On 6/20/2013 12:09 PM, Karen Robbins wrote:
Thanks, setting "pure black" did the trick! Any idea why this affects
only .tif files?
--Karen
It's just the choice Xerox made in setting up the printer driver. If you
look at the choices, "Composite Black" uses all four CMYK plates to
create everything. As I recall, it is the default setting that comes
with the printer, probably because it uses a lot of unnecessary toner
and increases toner sales for Xerox. But composite ink is bad for text
and line drawings because the danger of slight misregistration of the
color plates can cause annoying color ghosts on type and lines.
The "Automatic" choice is a little better, using only black toner for
text and line art, but it still wastes color toner on b&w photos. Again,
my guess is that Xerox knows many people won't notice this, so it's good
for toner sales. There is a risk of misaligned colors here, but it's not
as obvious with photos, and if it doesn't happen, the photos will have a
darker black and might look a bit nicer.
The "Use Pure Black" option fixes it all and uses only pure black on
objects that are pure black. There's no wasted toner and no risk of
obvious plate misalignment on thin lines. If you ask me, this should be
the default setting for Xerox printers, but then I'm not trying to sell
unnecessary toner. :)
Mike Wickham
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