Digital BW, The Print

Alex:

You are heading into uncharted waters (at least by me) of reordering 
the ink positions and using the Epson driver with no adjustment 
curves.  Paul Roark theorized several months ago about switching the 
FS ink positions, but I don't remember the details or know if he ran 
any tests.  

You indicated you tried the VM inkset and found it didn't work for 
you on your 2000.  Now that you have the FS-E inks, I suggest you 
consider the Woolf lumped/nonpartitioned work flow for the FS-E 
inkset before you commit to your plan--this is an alternative to the 
PiezoBW driver.  

The workflow can be found on the MIS Quad Workflow page at:  
www.inksupply.com.

Good Luck.

Jeff Randall

--- In DigitalBlackandWhiteThePrint@y..., "a_pettit_jr" 
<a_pettit_jr@y...> wrote:
> --- In DigitalBlackandWhiteThePrint@y..., "jrandall1149" 
<jrandall@c...> wrote:
> > Alex:
> > 
> > Good, we are making progress.  Overall, what is your purpose/goal 
of 
> > doing these experiments?  Where are you going with this?  Are you 
> > trying to develop from scratch an inkset that will create smooth, 
> > full range grayscale prints using only the Epson driver?
> >
> 
> Yes, Jeff, or at least get closer to the proper grey mix rather 
than try to do all the recorrection of the inkset with software. From 
a microscopic view of the 21Step chart, it appears that the Epson 
driver uses the PC and PM inks to about the 45% level and then to the 
C and P for darker shading, the B becoming significant above 75%, 
with the C predominant from 35%-65% and M from 65% to 90%. The Epson 
driver thus uses the M position for the darkest shading.
>  
> > 
> > Ok, you printed a 24-bit grayscale image.  What inks in what 
> > positions did you use to print the 21-stepwedge?  What Epson 
dialog 
> > settings did you use (Color or Black, Color Correction On or Off, 
> > what printer profile, etc.)?  
> 
> Epson setup : Color mode, Correction Off, default ICM, Stock Epson 
2000P Color Inkset. I have yet to fill the CIS carts and install 
them - 
> 
> 
> > NOTE: Without applying a partitioned curve to a 24-bit BW image 
or a 
> > lumped/non-partitioned curve to an 8-bit BW image all you are 
testing 
> > is how the native, uncontrolled Epson driver responds.  Of course 
it 
> > will yield strange results.
> >  
> 
> I am lost in lumped partition workspace - very unfamiliar with 
these procedures.
> 
> 
> > 
> > Very interesting procedure.  How the inks on paper reflect light 
to 
> > the eye might be better quantified if you p
> > 
> 
> 'p' print ??? I can't print until I install the inks, and I will do 
that only after I choose their positions. I am sure there is some non 
proportionality between dilution density and printed grey level.
> 
> > 
> > The actual *color* Magenta may be darker (less luminious) than 
Cyan, 
> > I have not done the experiment.  However, the current ink 
positions 
> > of FS, FS-E, & PiezoBW are a historical artifact based on the 
> > original positions chosen by the developers of the PiezoBW driver 
who 
> > totally bypassed the Epson driver.  In reality, the inks can be 
in 
> > any position (eg., either yellow or photomagenta position could 
hold 
> > the darkest ink) if the driver is written correctly.  When MIS 
> > developed the FS inkset they wanted folks to be able to use the 
FS 
> > inks with the PiezoBW driver.  Because many folks wanted to also 
use 
> > the MIS inks with Epson drivers, a series of partitioned and 
> > lumped/nonpartitioned curves were developed to control the Epson 
> > driver with the inks in the historical positions.
> > 
> 
> I am going to try to do this with the Epson Driver as there are no 
alternatives (aka Piezo) for the 2000P. I had fully planned to stuff 
this printer in the closet and purchase a 1280; this is a last 
attempt at making my 2000P work before doing so. 
> 
>  
> > 
> > 
> > Many folks are using the VM and FS families of ink with an Epson 
> > driver quite sucessfully and producing smooth, nonposterized 
prints 
> > with the currently available workflows.  The partitioned 
workflows 
> > have been especially written for the current ink densities and 
> > *color* positions.  There may be mislabeled bottles or 
incorrectly 
> > filled carts, but there are no 'misplaced' inks.
> 
> I tried a set of VM prefilled carts ( for the 1280 ) and was not 
pleased at all with the results. I tried Paul Roark's color 
correction curves, but never got satisfactory results - the prints 
were highly posterized..
>  
> 
> 
> Regards,
> Alex