Digital BW, The Print

I "think" I figured out the problem, but I'd love some confirmation 
from more experienced QTR curve builders.

I believe I had the ink limit set too high, which bunched the deep 
shadow values a little to close together.  There was 'some' 
difference between shadow values, and they always did increase (no 
reversals), but it appears that wasn't enough.  I am guessing the 
curve creation module looks for a minimum difference between patches 
before it will accept the linearization data.  

I lowered the ink limit, bumped up the black boost, and this gave me 
the same Dmax but much more spacing between shadow values.  When I 
did that, it seemed to work.

Does this sound about right?

Thanks, Lou

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Louis Dina" 
<lou@...> wrote:
>
> Sorry....I posted this on the QTR forum, but it is a little slow 
over 
> there.  Please excuse the 'cross post'.
> 
> *************************************
> 
> I am using QTR 2.5.2.1 on a Windows XP machine. I keep getting an
> error message when trying to linearize that reads:
> 
> "Invalid linearize curve -- not constantly increasing. Curve
> Creation failed."
> 
> I export data to a tab delimited text format and drag it onto the 
QTR-
> Linearize-Data.exe file and I get a nice smooth ramp without any
> reversals in the L* data. Then I copy the "linearize" data line in 
> the bottom of the generated text file and paste it into the 
> Linearization window of the curve creation module. The data pastes 
> fine looks fine to me.  It is listed L* units in descending order 
as 
> in other profiles I have built successfully.  
> 
> What the heck am I doing wrong? Below is the linearize data for this
> file:
> 
> QTR-Linearize-Data version 2.5.2.0
> 
> LINEARIZE="95.63 93.09 88.98 85.03 81.23 76.85 71.99 68.03 63.64 
58.9
> 53.9 49.73 44.41 39.95 34.64 28.78 22.71 15.46 10.57 6.85 6.39"
> 
> Thanks, Lou Dina
>