Digital BW, The Print

Eb4Plus-matte .acv curves provided by Paul Roark use designations: GS-2,N-3, N-4,N-5 while page 21 of "Eboni-4 Plus" refers to N-2.  What is different with these files, when are they used and where do I find the "N-2" version.

Thanks & Happy New Year

My nomenclature is often a mystery, even to me.

The "GS" curves in my 1400-Eb4-Plus folder have the R=G=B curves equal.
 The overall curve adjusts the gray scale ramp to bring it closer to ideal
for gray gamma 2.2 workspace.  From these curves (whichever one works the
best for the particular paper), you can move the individual curves to
adjust the tonality of the print.  These curves just give you a convenient
starting place to make custom tone curves for the paper and print tone
goals you're pursuing.

The N-2, N-5 and whatever else might be there are different interpretations
of what many would see as basically "neutral" prints.  Again, different
curves will give different results on different papers.  So, there is a
selection of curves to try.

I post profiles at
http://www.paulroark.com/BW-Info/Eboni-4-Plus-Profiles.zipbut
occasionally some get left out.  Hopefully the n-2 you're looking for
is there now.

As you can see from the graph on page 22 of
http://www.paulroark.com/BW-Info/Eboni-4-Plus.pdf, the N-2 curve
over-weights the green curve/M-channel Eboni inks in the shadows to avoid a
cold shadow region.  The result is an ink mix that prints a relatively
flat, neutral/cool response curve on Red River Aurora White (brightened)
paper.  While Aurora prints relatively neutrally with the R=G=B curves in
the highlights, many papers require a lot more of the cool inks there to be
neutral.

Hope this helps.

Paul
www.PaulRoark.com


On Thu, Dec 27, 2012 at 12:26 PM, rfsteckmeyer <steckmeyer@...>wrote:

> **
>
>
> Eb4Plus-matte .acv curves provided by Paul Roark use designations:
> GS-2,N-3, N-4,N-5 while page 21 of "Eboni-4 Plus" refers to N-2. What is
> different with these files, when are they used and where do I find the
> "N-2" version.
>
> Thanks & Happy New Year
>
>  
>


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