QTR-Quadtone RIP

Hey Tom, 

Now this is interesting. I did a little investigation of the profile 
I created using the method you suggested.

Using a text editor, I opened the .quad file that the curve creation 
tool output, and I looked at the gloss optimizer section.  Lo and 
behold, the first value in that section is zero. I manually changed 
it to be equal to the second value... and voila, I get full coverage 
of gloss optimizer on the pure-white areas of the page!

Incidentally, this isn't a perfect solution, because now the entire 
white space on the page gets a 30% coat of glop... not just the 
white space within the image boundaries.  Fine for an 8x10, not so 
economical when printing a smaller image.

So it looks like this is just a minor bug in the curve creation tool.

Matt




--- In QuadtoneRIP@yahoogroups.com, "mattchapin2" 
<matthew.chapin.wh00@...> wrote:
>
> Hey Tom,
> 
> That is exactly what I did.  I entered these points in my gloss 
> optimizer curve:
> 
> 0,30 <- 30% glop at pure white
> 60,0 <- ramp down to 0% glop at 60% gray
> 100,0 <- keep it pegged at 0 for dark areas.
> 
> However, when I print with this profile, what I seem to get in the 
> printer output is:
> 
> 0,0 <- No glop at pure white
> 1,30 <- 30% glop at the very lightest shade of gray
> 60,0
> 100,0
> 
> So close, and yet so far!  This seems to be an issue with the QTR 
> print driver. 
> 
> Matt
> 
> 
> --- In QuadtoneRIP@yahoogroups.com, "Tom Moore" <r.t.moore@> 
> wrote:
> >
> > Matt
> > 
> > Sorry, I missed question this earlier. Have you tried the 
> following:
> > 
> > For the ink position with the glop installed, in the Curve 
> Creation dialog,
> > Ink Setup tab, select the Load Curve option from the dropdown 
> menu. Then
> > click the Curve button that appears for that ink and enter the 
> values for
> > your curve. The values are a series xy coordinates (I think x is 
> the input
> > gray level (0-100), y is the output value for the ink as a 
> percentage of the
> > applicable ink limit) for a curve that determines how much ink 
(in 
> this case
> > glop) that is output for each level in your image. 
> > As an example the values 0,20; 20,0; 100,0
> > would output 20% glop at 0 density (paper white), ramp down to 
0% 
> glop at
> > 20% gray and remain 0 for all darker tones.
> > 
> > I'd be interested in hearing how this idea works.
> > 
> > Tom Moore
> > 
> > > -----Original Message-----
> > > From: QuadtoneRIP@yahoogroups.com 
> [mailto:QuadtoneRIP@yahoogroups.com] On
> > > Behalf Of mattchapin2
> > > Sent: Sunday, October 08, 2006 5:44 PM
> > > To: QuadtoneRIP@yahoogroups.com
> > > Subject: [QuadtoneRIP] Issue creating R800 profile using gloss 
> optimizer
> > > 
> > ...
> > > 
> > > My question is:  Has anyone found a way to force QTR to print 
> gloss
> > > optimizer in an area of pure white?
> > > 
> > > Thanks!
> > > Matt
> > >
> >
>