Digital BW, The Print

Jeff Randall wrote:

>John Woolf indicates that his grayscale w/curve tweaking workflow as
>posted on the MIS website (www.inksupply.com) will work for both the
>Full Spectrum and Original MIS Quad inks.  Wouldn't the results be
>significantly different because the two ink sets have different CMYK
>positions in the printer?

Since the Woolf workflow is an 8-bit, non-partitioning workflow, it's a bit
like pouring all the inks together anyway.  So the ink order is not critical
the way it is in a more complex, partitioning workflow like the Piezo or the
MIS VM RGB curves.

Paul
http://www.PaulRoark.com

Paul:

Doesn't the Epson driver partition the grayscale in Woolf's workflow
(instead of manually partitioning like your VM Quad RGB and Brandin's 
Original Quad RGB workflows)and Woolf's "curve" then adjusts, ahead 
of time, the Epson driver's output?  [Yes I know why not do it right 
the first time in one step, but I am curious?]

I agree that the 8-bit workflow could be problamatic with certain 
images.

Jeff Randall



Paul Roark wrote:

> Since the Woolf workflow is an 8-bit, non-partitioning workflow, 
it's a bit
> like pouring all the inks together anyway.  So the ink order is not 
critical
> the way it is in a more complex, partitioning workflow like the 
Piezo or the
> MIS VM RGB curves.


> Jeff Randall wrote:
> 
> >John Woolf indicates that his grayscale w/curve tweaking workflow 
as
> >posted on the MIS website (www.inksupply.com) will work for both 
the
> >Full Spectrum and Original MIS Quad inks.  Wouldn't the results be
> >significantly different because the two ink sets have different 
CMYK
> >positions in the printer?

Jeff,

You wrote:

>Doesn't the Epson driver partition the grayscale in Woolf's workflow
>(instead of manually partitioning like your VM Quad RGB and Brandin's
>Original Quad RGB workflows)and Woolf's "curve" then adjusts, ahead
>of time, the Epson driver's output?  [Yes I know why not do it right
>the first time in one step, but I am curious?]

Perhaps I missed something in the workflow, but I think that it just
involves a single curve on a grayscale file.  The Epson printer, thinking
it's a color inkset, will distribute the "colors" equally so that the image
will remain gray.  So, the partitioning that the Epson driver does is
between the black and "colors" and between the light/photo and full strength
inks in the 6-ink printers.  What the Epson driver will not do is put the
lightest ink only in the highlights, etc.

The yellow-position ink in the standard MIS quads is MIS's "50%," and this
is very dark ink -- much darker than 50% of the darkness of the straight
black.  So, even in 6-ink printers there will be a very dark ink in the
highlights.

A workflow like this might well satisfy most users in the latest 6-ink
printers, but there will be more visible dots than a partitioned quad
workflow.  I used a non-partitioned workflow at first with standard MIS inks
on an 1160.  The prints were OK as large display prints, but I wouldn't be
happy with that approach for smaller prints.

Paul
http://www.PaulRoark.com

Paul:

Thanks for the quick tutorial.  You've convinced me (a 1160 user) of 
the need to partition in RGB space to "trick" the Epson driver into 
matching the applicable ink darkness with the applicable portions of 
the grayscale.  Very logical.

Jeff Randall

--- In DigitalBlackandWhiteThePrint@y..., "Paul Roark" 
<paul.roark@v...> wrote:
> Jeff,
> 
> You wrote:
> 
> >Doesn't the Epson driver partition the grayscale in Woolf's 
workflow
> >(instead of manually partitioning like your VM Quad RGB and 
Brandin's
> >Original Quad RGB workflows)and Woolf's "curve" then adjusts, ahead
> >of time, the Epson driver's output?  [Yes I know why not do it 
right
> >the first time in one step, but I am curious?]
> 
> Perhaps I missed something in the workflow, but I think that it just
> involves a single curve on a grayscale file.  The Epson printer, 
thinking
> it's a color inkset, will distribute the "colors" equally so that 
the image
> will remain gray.  So, the partitioning that the Epson driver does 
is
> between the black and "colors" and between the light/photo and full 
strength
> inks in the 6-ink printers.  What the Epson driver will not do is 
put the
> lightest ink only in the highlights, etc.
> 
> The yellow-position ink in the standard MIS quads is MIS's "50%," 
and this
> is very dark ink -- much darker than 50% of the darkness of the 
straight
> black.  So, even in 6-ink printers there will be a very dark ink in 
the
> highlights.
> 
> A workflow like this might well satisfy most users in the latest 6-
ink
> printers, but there will be more visible dots than a partitioned 
quad
> workflow.  I used a non-partitioned workflow at first with standard 
MIS inks
> on an 1160.  The prints were OK as large display prints, but I 
wouldn't be

> happy with that approach for smaller prints.
> 
> Paul
> http://www.PaulRoark.com