QTR-Quadtone RIP

Thanks for the response. After much trial and error, I got the output 
to match by adjusting the Gamma, highlights and shadows and 
linearizing. I think I may have had better results earlier if I would 
have linearized after my first 21 step adjustment.
 
Regards,
 
Tony



--- In QuadtoneRIP@yahoogroups.com, "Jeff Randall" <jrandall@...> 
wrote:
>
> I'll take a swing, but Roy and others may want to chime in if I'm 
> off base.
> 
> First, adjusting the output midtone gamma and shadows ink limits 
(as 
> you have done) is probably the best way to lighten or darken an 
> existing linearized profile. 
> 
> Assumming you relinearized your profile after adjusting the 
> graytones gamma or highlights/shadows values, QTR theoretically 
> should internally create and apply an adjustment curve that 
> straightens out the measured curve (based on the linearization 
> density or L data you input) shown in the Curve Creator|Create 
> Curve|Linearization plot between your measured dMax and dMin. 
> Therefore you shouldn't see much if any variation.  In my 
> experience, tweaking with the graytone values only helps the 
> linearization process along. 
> 
> --- In QuadtoneRIP@yahoogroups.com, "stasunas" <Astasunas@> wrote:
> >
> > I am trying to match the output of two printers, an Epson 2200 
> with UT7 
> > inks and an Epson 7600 with UC inks. Because of the diffferent 
> inks 
> > matching exactly may not be achievable, but ball park is desired. 
> I 
> > have printed out 21 steps for each and measured them with my 
> PrintFIX 
> > Pro spectro and for the 2200 is lighter through most of the 
range. 
> I 
> > then tried adjusting the Gamma (1.1, 1.25, 1.5) and Gray curve 
> shadows 
> > and highlights(from 6 to 10) for the 7600 curve in Curve 
Creation, 
> but 
> > the output by eye did not change enough to measure. But when I 
> changed 
> > the Shadow and Midtone values (-20, -6), the steps lightened and 
> > approached the densities of the 2200.
> > My question is, why am I not getting changes by adjusting the 
> Gamma or 
> > the Shadows & Highlight in the Curve Creation? Are my adjustments 
> too 
> > small, or is something else going on?
> >
>