QTR-Quadtone RIP

Hi everybody,

I have built some curves for the EEM yesterday (based on the curves 
supplied by Roy) and noticed that the original R800 curves do not use 
Photoblack. However in the printed Testchart photoblack is clearly 
lighter that Matte black so that I just tried to use photblack as a 
Lightblack. The results seem to be quite good. With the new 
linearized curve (including photoblack) I do not have anymore banding 
problems and the print is smooth and not as dotty as when using the 
original curve. I seem to get much smoother transitions than before. 
Tonewise I had to add a little more Magenta to neutralize a greenish 
tone which Photoblack seems to have.

However the last tests have done resulted in a slightly contrasty and 
light (otherwise good) print. Can I change the shadows / highlights 
or Gamma for the black ink after having linearized or will I have to 
linearize all over again after having changed shadows and highlight?

If anyone is interested I could upload my cold and warm curve.

Regards,

Ignacio

--- In QuadtoneRIP@yahoogroups.com, "smack0606" <smack0606@...> wrote:
>
> Hi everybody,
> 
> I have built some curves for the EEM yesterday (based on the curves 
> supplied by Roy) and noticed that the original R800 curves do not use 
> Photoblack. However in the printed Testchart photoblack is clearly 
> lighter that Matte black so that I just tried to use photblack as a 
> Lightblack. The results seem to be quite good. With the new 
> linearized curve (including photoblack) I do not have anymore banding 
> problems and the print is smooth and not as dotty as when using the 
> original curve. I seem to get much smoother transitions than before. 
> Tonewise I had to add a little more Magenta to neutralize a greenish 
> tone which Photoblack seems to have.
> 
> However the last tests have done resulted in a slightly contrasty and 
> light (otherwise good) print. Can I change the shadows / highlights 
> or Gamma for the black ink after having linearized or will I have to 
> linearize all over again after having changed shadows and highlight?
> 
> If anyone is interested I could upload my cold and warm curve.
> 
> Regards,
> 
> Ignacio
>
--------------------------------------------------------------------
Hi Ignacio

I am french,please excuse me for my quite poor english.

I just try QTR whith an R800.
My results are quite good,but I wish to test your profile
Mine is as follow:
Starting with the UC-EEnhMatte-cool and keeping the linearization
curve of it,I change the values in the Curve Creator like that:
-Defaut ink limit 75
-Gray ink   density 100
-Blue ink   density 10    Limit 10
-Photo Black  density 30  Limit 30

Regards

Jean-Claude

Hello Jean-Claude,

sorry for answering so late, but Iid not really expect anybody to 
react to my message :-) I will try to upload the profile for the R800 
in the groups file section and let you know.

Regards,
Ignacio



--- In QuadtoneRIP@yahoogroups.com, "papyjcl" <jclasserre@...> wrote:
>
> --- In QuadtoneRIP@yahoogroups.com, "smack0606" <smack0606@> wrote:
> >
> > Hi everybody,
> > 
> > I have built some curves for the EEM yesterday (based on the 
curves 
> > supplied by Roy) and noticed that the original R800 curves do not 
use 
> > Photoblack. However in the printed Testchart photoblack is 
clearly 
> > lighter that Matte black so that I just tried to use photblack as 
a 
> > Lightblack. The results seem to be quite good. With the new 
> > linearized curve (including photoblack) I do not have anymore 
banding 
> > problems and the print is smooth and not as dotty as when using 
the 
> > original curve. I seem to get much smoother transitions than 
before. 
> > Tonewise I had to add a little more Magenta to neutralize a 
greenish 
> > tone which Photoblack seems to have.
> > 
> > However the last tests have done resulted in a slightly contrasty 
and 
> > light (otherwise good) print. Can I change the shadows / 
highlights 
> > or Gamma for the black ink after having linearized or will I have 
to 
> > linearize all over again after having changed shadows and 
highlight?

> > 
> > If anyone is interested I could upload my cold and warm curve.
> > 
> > Regards,
> > 
> > Ignacio
> >
> --------------------------------------------------------------------
> Hi Ignacio
> 
> I am french,please excuse me for my quite poor english.
> 
> I just try QTR whith an R800.
> My results are quite good,but I wish to test your profile
> Mine is as follow:
> Starting with the UC-EEnhMatte-cool and keeping the linearization
> curve of it,I change the values in the Curve Creator like that:
> -Defaut ink limit 75
> -Gray ink   density 100
> -Blue ink   density 10    Limit 10
> -Photo Black  density 30  Limit 30
> 
> Regards
> 
> Jean-Claude
>