Digital BW, The Print

I uploaded some samples to hopefully help diagnose what's going on:

-       QTR ink pattern page

-       21-step RGB gradient printed in Photoshop with no curves

-       21-step gray gradient printed in Photoshop with Paul's QTR
curve

-       21-step gray gradient printed in QTR with Paul's EpsHpn
profile

www.stepwise.ca/Eboni-6_Samples.jpg
<http://www.stepwise.ca/Eboni-6_Samples.jpg>



--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "mccarvill"
<mccarvill@...> wrote:
>
> Just made the switch from UT14 to Eboni-6 on my 1400 and have a few
questions. I read Paul's PDF and the read-me files that accompanied his
PS and QTR curves, but I'm still a bit confused. In terms of background,
I've used UT14 for years with great success (mostly with QTR but
sometimes with Photoshop), but was intrigued by the extra smoothness
promised by Eboni-6. My 1400 prints a perfect nozzle check, although the
Y channel is very faint (see question below on this). I was very careful
to ensure I loaded the inks correctly in the carts.
>
> General question
> - I understand the Y position ink is very light, but it is so faint
when I do a nozzle check that I'm wondering if there's a clog in the
cart. There are no gaps in the pattern when I examine it closely, but is
it really so faint as to be barely visible?
>
> Photoshop questions
> - Should my images be in RGB or grayscale before applying the PS
curve? I'm getting warm, muddy results in both.
> - I've had excellent results with UT14 with simply applying Paul's
neutral Photoshop curve, but do I need to make an ICC with a
partitioning curve to get a decent test pattern with Eboni-6?
>
> QTR questions
> - I copied Paul's QTR profiles to the `Quad1400-MIS' folder and was
able to open and create curves for all profiles except
`Eb6-PaSmBW-qtr2880-lin'. This last curve repeatedly gave me the error
message `Invalid linearize curve – not constantly increasing. Curve
creation failed.' Thoughts on how to fix this? This paper is probably
the one I'll use the most.
> - I printed a test pattern on Premier Matte using the Eb6-EpsHPn curve
but it was muddy, mottled, and inaccurate (e.g. 60% was darker than
75%).
>
> Thanks in advance,
>
> Mark
>



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