Re: R800 and R1800
Re: R800 and R1800
- Subject: Re: R800 and R1800
- From: Ernst Dinkla <email@hidden>
- Date: Thu, 17 Mar 2005 11:55:02 +0100
email@hidden wrote:
I've worked with profiling both the R800 and the Japanese version of
the R1800. There is a gloss optimizer (polymer without pigment) that
is used to mimimize gloss differential in gloss prints. Gray balance
with RGB profiles is about as good as previous UltraChrome printers; I
wouldn't want to print black and white images through any of them, but
for color they're fine.
Would you consider them even less suitable for neutral B&W printing than
the CcMmYK or CMYK models are?
I expected that more or less and said so in the digital B&W mailing
list. On the other hand you may expect more detailed, finer gradations
of its 1.5 droplet in monochrome printing but it doesn't have a setting
for Black Only in the driver, there's a monochrome setting but that's
using color in the print. Harrington's QTR driver may solve that but I
still do not expect it to become a nice B&W printer despite an
acceptable black Dmax reported so far. A black + a grey or more greys in
an inkset do wonders. The number of nozzles that squirt black in
monochrome mode counts as well for consistency in B&W printing.
Another issue is the use of the gloss optimizer, where it is used to
print on white gloss areas to reduce the difference in gloss with the
printed area it also makes the white a bit grey.
A suspicion: In time it will be harder to keep the desktops models + the
Epson driver consistent in color. The RGB profiling relies on the
N-color separations in the paper settings. The lack of custom
linearising is harder to compensate in profile creation when 6 hues are
used than with 4 hues. An interesting test of Bob Frost showed that a
greyscale wedge printed in monochrome had blue all the way but the
heaviest shadows, black generation above 50%, below that CMYBlue. The
blue is probably used to compensate for the warm black ink used but kept
in the mix for a simpler method in total. One would expect a longer
black generation in the monochrome mode of this driver given the
smallest droplet size of 1.5 picoliter.
All in all I think that Epson will keep its CcMmYKk inkset models,
especially on the wide formats. Like the 4000 we may get a choice of
inksets per model.
Glop is now the acronym for gloss optimiser on the digital B&W list :-)
Ernst
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