Thanks Paul! I'll wait for the new inksets to become available and
ask you more then. Since I'm currently pumping out excellent 8x12s
from my hp 7660 it isn't an urgent purchase, but I will really look
forward to having both systems up and running so I can print from the
most appropriate one for each image (both have different strenghts).
I didn't think about trying to apply curves in 16bit mode, but it
makes sense that it could help. I usually just tried to push my
tones away from the difficult transitions and was usually able to get
a good print.
mark
--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark"
<paul.roark@v...> wrote:
> >> ... 1160 and I'm ready to go with a new inkset.
>
> >Unfortunately, the UT2 inkset will not work on the Epson 1160.
>
> >Before using the UT inkset I used the FS-N inkset and would not go
> >back. The UT inkset has a better longevity rating and my printer
is
> >now pretty near clog free.
>
> >But, maybe Paul has another inkset to replace the present FS-N
inkset
> >that would work on the Epson 1160?
>
> Yes, there I've formulated "UT-FSN" and "UT-FS-Warm" (carbon)
inksets (as
> well as intermediate tones), but MIS needs to get them on the
website before
> they'll be available for sale. (Don't bother calling MIS before
then. They
> can't process the orders.)
>
> The UT-FS-W (carbon) is warmer than the current FS or the old VM
warm. For
> a "neutral-warm" tone/hue mix 1/3 warm with 2/3 neutral. For
warmth equal
> to the old VM warm curve, mix 1:1. I'm not sure if MIS is going to
have
> these intermediate tones pre-mixed.
>
> I have new curves for the 1160 (and 3000) for the UT-FS inks. Even
though
> they are the same densities as the old FS (& Piezo) inks, I wanted
to re-do
> the curves.
>
> I am not a fan of the old partitioning curves. Some partitioning
can't be
> avoided with the 3000, and the 1160 will still give very slightly
smoother
> highlights with partitioning. However, the radical partitioning
curves were
> the source of lots of the posterization problem. They fight the
Epson
> driver's built-in partitioning, and they accentuate the production
> differences between printers.
>
> So, for the 1160 in addition to fully partitioned curves for EEM and
> PhotoRag, I have a grayscale curve and a "mild" RGB partitioning
curve
> (RGB-EEM-2).
>
> This mild partitioning curve, I think, hits a good compromise
between
> smoothness and not interfering with the driver's attempts to
control the
> inks. It should be relatively tolerant of printer differences and
easy to
> modify for different papers. All the individual color curves start
at the
> (0,0) and end at (256,256), and there are no reverse slopes. The
approach
> puts predominantly light inks in the highlights, then has those
curves go to
> a very low slope in the midtones, where the dark gray (cyan ink,
red curve)
> goes into a nice even and manageable slope.
>
> I hope that this approach solves some of the partitioning problems.
>
> Another thing to try whenever you see vertical lines in the smooth
ramp of
> the 21-step test file (don't just look at the steps -- those mild
looking
> vertical lines are trouble) or you have some flat spots in a print
is to
> convert the RGB file to 16 bit before applying the curve. Once the
curve is
> applied the file can be re-converted to 8 bit for printing.
Whenever the
> main curve that is laying down ink has a low slope, the Photoshop
curves
Show quoted textHide quoted text
> algorithm seems to need the 16 bit mode to avoid stair-steps.
>
> Paul
> www.PaulRoark.com
>
> For UT2 information, curves, and settings see:
> http://home1.gte.net/res09aij/