--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "sanfo2003"
<SandyCornelius@c...> wrote:
> >I'm wondering if this is true BO and the black ink is that cool,
or
> >whether some color ink is mixed in...can you tell with a loupe?
>
> As far as I can tell there are no colors being used in monochrome
> printing. The only loupe I can find around here is a 5X (can't find
> my 8X, where the heck did I put it?) and I couldn't see any other
> color with that. Also stopped a small print half way thru printing
to
> check out the ink gradient as it was being laid down and saw no
other
> colors.
Sandy,
Recently I did a little study of the ink-laydown used by my
Epson C80's driver when printing a 21-step grayscale wedge. One thing
that turned up MAY be relevant to your finding out whether the R800
uses only black ink with the settings you mentioned:
With the C80 driver, when "Black Ink" is selected, only black ink is
used. No matter if I stopped the printing at the beginning, at the
middle, or at the end, only black ink was visible. However,
when "Color" was selected, the ink-laydown method was unexpectedly
complex. At the beginning, in the 100, 95 & 90% steps, only black was
used; from 85% on down, there was only cyan. When I aborted the print
at the middle, I could the tracks of magenta and yellow coming in on
top of the cyan -- to this point, nothing surprising had happened.
When I interrupted the printing very near the end, though, I saw that
the black ink in the 100, 95, and 90 steps had been overlaid by some
cyan (and so had the steps farther down -- for them this was a second
coating of cyan). So the question I'd raise in regard to the R800
(which, I gather, has no explicit "Black Ink" setting) is whether
the ink-laydown for a line includes adding cyan at the very end.
Given that the prints you get under the "Monochrome" setting have a
bluish tone, is it possible that something like what I found with the
C80 is going on?
John