QTR-Quadtone RIP

I'm not sure I understand what you are doing with the Excel 
spreadsheet, but I suggest that you load the measured densities into 
the QTR Curve Creator Linearization tab and reprint your wedge with 
the linerized profile instead.  Then remeasure the densities of 
second wedge and plot in Excel.  They should be linear between the 
paper white and dMax you measured.

jr

--- In QuadtoneRIP@yahoogroups.com, "stasunas" <Astasunas@...> wrote:
>
> I am having problems getting a curve that doesn't flatten out the 
> shadows for my images. I am using Condor BW with an Epson 7600 and 
UC 
> inks with Matte Black.
> 
> I created a determined my black ink limit to be 50 and created a 
> curve and printed a 21 step gray scale. I read the densities using 
my 
> PrintFix Pro Spectro and loaded the values into an Excel 
spreadsheet. 
> I also loaded two ideal step wedge values, 1.50 and 1.55 to 
compare 
> with my 21 step wedge using line graph I created in Excel. After 
> several interations of adjusting the Gamma, Shadow and Highlight, 
I 
> got a curve in Excel that was close to the shape and values of my 
> ideal. Then I took the density values from that 21 step wedge and 
> entered them into the linearization area of curves creation.