QTR-Quadtone RIP

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> --- In QuadtoneRIP@yahoogroups.com, "Jamie Creed" <jlcreed@> wrote:
> 
I did try something new last night, I produced a simple Lab a axis
toner curve on its own, using the Load Curve option in the curve
creation tool and set the figures of 0,0 and 100,100 with the 
default ink limit of 65% in my case ( this basically gave an ink 
seperation 21 step wedge) which I then linearised. I then 
produced  a print using a blend of 50% of my neutral curve and 50% 
of the above Lab a toner curve (to just pull the neutral curve along 
the Lab a axis - just like Paul said it would) to produce the kind 
of toned print I've been hoping for since I closed down my darkroom, 
I'm very satisfied indeed.

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> 
> Hi Jamie,
> 
I don't completely get what your doing. This "simple Lab a axis 
toner curve", does that ONLY uses the Lab a toner? No K or LK inks? 
If so, the it has no black whatsoever, so any blend with this curve 
would have (heavily?) reduced Dmax. Is that the case or are you 
doing something differently?
> 
> Joost
>

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Hi Joost

Firstly remember that I'm only playing around at the moment, and 
trying to find the extremes, eventually I will pull back a little, 
so at the moment I'm getting excited with what I'm seeing and would 
love for others to share any ideas they have got for using the UT3D
inkset. 

My "simple Lab a axis toner curve" at the moment does only contain
the Lab a axis toner, nothing else, and you are correct: the dmax is
reduced, but I can easily correct this, which I shall do by changing
the settings in the load curve window so that none of the Lab a ink
is laid down in say the 75% to 100% area.

The idea came from the way I decided to go about creating my basic
curves. Firstly, the Carbon curve at 1 extreme and the Cool curve at
the other extreme, so in my mind by using the blending option in QTR
I should theoretically move up and down the Lab B axis (give or take)
and then if I spend time producing the best standalone neutral curve
that I can for my setup, I should in theory, be able to move along 
the Lab a axis from a roughly neutral position to where ever I 
wanted to go (obviously image dependant) using the Lab a axis toner 
curve. Maybe my thinking is to simplistic and someone could jump in 
with a few ideas,

Jamie.