Digital BW, The Print

Paul,

Yes QTR will work VERY well with Hextone inks in the supported 
printers, which include most of the useful ones.  About "qacvraw", I 
have not had any use for it.  But I can assure you, you cannot use 
the RGB partition curves you have created for Hextone inks.

QTR is actually sweet with any ink design you care to throw at it.  
It limits each ink channel individually, so you no longer rely on 
the "paper setting" in the Epson driver for that.  It partitions the 
inks you CHOOSE to use according to tone, and finally, it linearizes 
the tonal response from DMax to DMin.  And you CHOOSE to use ink 
channels as you desire, creating curves specific to your choice.  Let 
me give you an example of what I am working on on my 1280 right now:


K = Ebony, C = UT FS Neutral Dark, M = UT FS Warm Dark, LC = UT FS 
Neutral Medium, LM = UT FS Warm Medium, Y = UT FS Warm Light + Yellow 
UC Clone (I am tweaking the right mix).

With this set-up, I can print;

(1) all warm using just the K, M, and LM channels.
(2) all neutral using just the K, C, and LC channels
(3) a mix of "warm" and "neutral" across the entire tonal range (in 
10% steps)
(4) split-toned neutal/cool shadows to warm/gold highlights using K, 
C, LC, and Y channels.
(5) spilt-toned warm shadows to neutral highlights using K, M, and LC 
channels.
(5) Many other variations and mixes thereof.

Pretty nifty, if you ask me.  Once you get used to the method, it is 
really easy.  The great thing is that you are not affacting the 
integrity of the image file in the image editor.  So no 
posterization - ever!

With all due respect to you and your ink designs and curves methods, 
QTR takes them to a whole new realm of possibilities.  I can spend 
time designing the look I want with the inks, and NOT have to then 
slave at making the printer behave according to my whims.  QTR takes 
care of that.

Best regards.

Shilesh

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul Roark" 
<paul.roark@v...> wrote:
> Appendix 2 of Tom Moore's very useful Tutorial on making curves for 
QTR
> says, "quacvraw is a way to convert a photoshop curve into a 
QuadToneRIP
> curve.
> 
>  
> 
> How do these work?
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> 
> What kinds of Photoshop curves are covered?
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>  
> 
> Does it work for all Epson printers?  Hextone included?
> 
>  
> 
> Thanks.
> 
>  
> 
> Paul
> 
> www.PaulRoark.com <http://www.paulroark.com/>  
> 
>  
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> 
> [Non-text portions of this message have been removed]