Digital BW, The Print

Darrell:

I assumed that you wanted to create a lumped RGB curve (a non-
partitioned workflow that combines the three gray inks into one thus 
yielding a 2 toned ink set -- gray and black).  For this kind of 
workflow, only one curve is needed.  Examples are Nivin's and Woolf's 
workflows.  The workflow I used to generate the curves for my Epson 
1160 is a partitioned RGB workflow where a seperate "transfer" curve 
is created for each of the three gray inks. It, however, can easily 
be adapted to creating a single lumped RGB curve.  I have sucessfully 
used it to create a lumped RGB curve for my 1160 starting with 
Woolf's curve. 

Remember, that although you can not *directly* enter the I/O values 
of curves in Picture Windows, you can open the .crv (grayscale) 
and .cc (color) files in a text editor and tweak the values.

I recommend that you start your journey with developing a lumped 
workflow to gain experience.  Also lay in a large supply of ink and 
paper and note that the cost in time and supplies may approach the 
cost of the barebones Piezo system...  (;>)) 

Contact me here or offline if you have additional questions.

Jeff Randall


--- In DigitalBlackandWhiteThePrint@y..., "darrelleifert" 
<darrelleifert@y...> wrote:
> Jeff --
> 
> Thanks for the pointer.  I'll try and adapt your workflow to my 
Epson 
> 2450 and see how far I can get.  I've used Paul Roark's .AMP files 
> with PW but I'm getting some muddy midtones on my 1520, and so 
would 
> like to "start from scratch" (alas, no $ for Cone's Piezography 
> driver).
> 
> Cheers,
> Darrell
> 
> --- In DigitalBlackandWhiteThePrint@y..., "jrandall1149" 
> <jrandall@c...> wrote:
> > Darrell:
> > 
> > Try Transforms|Gray|Brightness Curve.  I recommend you set 19 
> points 
> > (plus the 2 end points) using Shift-click.  You can then print 
out 
> a 
> > stepwedge and scan the results to determine if each point should 
be 
> > made lighter or darker.
> > 
> > A generic proceedure to create these curves (including RGB 
> > partitioned curves) can be found in Profile_make2.pdf in 
> > Files > Ink Sets, reviews and techniques > MIS FS.
> > 
> > Good Luck.
> > 
> > Jeff Randall
> > 
> > 
> > --- In DigitalBlackandWhiteThePrint@y..., "darrelleifert" 
> > <darrelleifert@y...> wrote:
> > > Hi Folks --
> > > 
> > > Please forgive me if this question has been done to death, but 
> I'm 
> > > looking at using Nevins' Transfer Curve tutorial 
> > > (http://www.jnevins.com/transferfunctioncurve.htm) with Picture 
> > > Window in order to calibrate my Epson 1520 with MIS quadtones 
and 
> a 
> > > variety of papers.  Can PW emulate the "Transfer Functions" 
> dialog 
> > > box shown in the tutorial?  Has anyone else had success in 
using 
> > this 
> > > method with quadtone inks?  Thanks!!
> > > 
> > > Darrell