Digital BW, The Print

pdesmidt tds.net <pdesmidt@...> wrote:

> ...
> I’ll be setting up Carbon-6 in my 7600, using MIS C6C base.

What I did with a 4000 is setting it up was to clean out the tubes
first with cleaning fluid (just plain base) by detaching the tube from
the damper and using a syringe with a bottom fill adapter on it to
pull the old ink out of the line and the clear base into the line.
After sitting for a day with clear fluid, I flushed them again and
them had that fluid pulled through the heads with a power clean.  It
worked very well.


> The 7600 has 7 inks slots.  Starting from left to right:

The standard setup I recommend for the 7600 is in
http://www.paulroark.com/BW-Info/Eboni-6.pdf, at the bottom of page 3
and the top of page 4.


>
> #1     (Black)     Eboni MK,

> #2     (LK)     30% Eboni,

I recommend 18% Eboni for the LK as well as the M positions.  I don't
think you need two 30% inks in the setup.  With a normal QTR
partitioning, the part of the scale near the black end is already
rather tight -- that is, you have a lot of steep cross-overs.  If you
were to use the Epson driver either the 18% or 30% would work.

The one use I can think of for a second 30% would be if, like I did
with the 1400, you wanted to use it to slightly lower the Lab B of the
midtones.  It is  probably too dark to be used all way up, but on
large prints it might be OK.  On the 1400, using a Black Only curve
like that really lowers the Lab B, but those BO dots are a bit too
prominent for me.  Nonetheless, the 30%, perhaps paired with another,
lighter ink or manually drawn to avoid it's use until, maybe, dusting
in just a bit starting at 15%, used as  "toner" might have value.
This would take some experimenting.  Note that just having a single
30% and not using it in the primary QTR partition might be just as
good as a second 30%.  In the 1400, it worked very well.

> #3     (Cyan)    30% Eboni,

> #4     (Magenta) 13.5 % Eboni,

This is light.  I recommend 18%.  The "standard" setup I recommend in
the PDF prints light with the Epson driver.  Some find that it
actually matches their LCD monitors rather well, but I would not want
to go much lighter.  I understand that you'll be using QTR, but I do
recommend you keep the Epson driver as a possibility.   It does some
things rather well.

The 13.5% was a mix I recommended for those who wanted an "EZ" setup
in a C88.  It was close to the MIS EZ ink density and printed rather
well all across the scale.  With QTR you could use the 13.5 the way I
used the 30% in the 1400 -- as a "toner" to span the entire midtone
scale.  However, unlike the 30%, this will not lower Lab B.  It'll
probably raise it.

When the 2400 first came out, I used the C88 EZ Yellow to plug into
the Y position of the 2400.  Even the chip was compatible (2400 Y
apparently was the same ink as C88 Y).  It may be rather counter
intuitive, but the denser EZ ink actually made a smoother looking
print than using a lighter LLK type carbon ink.  I'm getting the same
visual impression from the 1400 with the 30% spanning the scale.  Why
do dots that are just under what one sees as a dot make the ramp look
smoother??  I can see on very close (dual reading glasses) inspection
that the pure 2% is probably technically smoother in the 5% patch, but
that is not the visual impression of the overall print.  It may be
that the single ink spanning the scale hides the cross-overs better,
or the denser ink is hiding some microbanding, or there is something
about the "edge of visibility" dots tying the scale together.  I don't
know.


> #5     (LC)        6%  Eboni,

The standard setup I recommend uses 9% Eboni for LC.

> #6     (LM)       6% Eboni,
> #7     (Yellow)  2% Eboni

> ... I’ll only be using QTR.

You might want to leave the possibility of the Epson driver there.
With coated matte papers it's a handy workflow.  A print on a paper
like Epson Hot Press Natural with an ICC, with an embedded curve using
lots of 2% initially, and otherwise partitioning the inks (giving a 24
bit pipeline to the printer) gives you a benchmark for performance of
other workflows.  It's a easy and fast alternative for coated papers.

> Hopefully, the results will be good enough with Arches HP.  If not,
> I’ll use Epson HPN.

Let us know how it works out.  I know there are others looking at the
same setup.  I was just told Epson is pulling the plug on supporting
the old 7500.  So, those with the older machines might want to
consider what they'll do when the parts disappear for that machine.

Paul
www.PaulRoark.com







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