QTR-Quadtone RIP

Igor

I think you still may be able to create the curve you want.

Using the QTR main window select the curve K7-1440-HanPhotRag as one curve
and select NK7-2880-HanPhotoRag. Right click each curve and display the
curve. You will see how the ink is used for each curve. The difference is
quite striking. Since each curve is for the same ink and paper (I am sure it
is anyway), the difference is due to the BPI chosen. The ink limits for the
K and LK are quite low for the 2880 curve. That's certainly a strong clue
that your measurements of the inkseparation page are correct in indicating a
low black ink limit. It should also be very low for the LK it seems.

By the way, if you're not using a densitometer, how are you measuring L
spectro, scanner?

Tom Moore 

> -----Original Message-----
> From: QuadtoneRIP@yahoogroups.com [mailto:QuadtoneRIP@yahoogroups.com] On
> Behalf Of isvibilsky
> Sent: Monday, October 03, 2005 4:18 PM
> To: QuadtoneRIP@yahoogroups.com
> Subject: [QuadtoneRIP] Re: What is the proper way to use 2880 dpi?
> 
> Tom,
> 
> Thank you for the tip. I have tried to reduce the ink limit (-20) for
> 2880 dpi and ended up with a decent result. It could be just the image
> I kept printing for all my testes.
> Regarding the L going up. It seems that excessive amount of inks
> creates a glossy look that my spectrometer detects as a higher L
> value. I don't use a densitometer.
> 
> I'll search for 2880 profile. I did all my testes using Epson enhanced
> matte paper.
> 
> Igor.
> 
> --- In QuadtoneRIP@yahoogroups.com, "Tom Moore" <r.t.moore@r...> wrote:
> > Igor
> >
> > Clearly one can create 2880 dpi curves for the 2200 because there
> are some
> > included in the latest distribution for PC (under the Quad2200-NK7
> printing
> > model). However, when I checked, although the curves were there (.quad
> > files) the original "source code" for the curves were not (the .qidf
> files).
> > I suspect the 2880 curves were created by Inkjet Mall, who did not
> want to
> > aid competitors by releasing the .qidf files. Unfortunate, because
> looking
> > at other's .qidf files is an excellent way of understanding how
> curves work.
> > You could ask on this list or on the BW printing list if any has
> 2880 curves
> > for the ink/paper you intend to use.
> >
> > Unfortunately I haven't made one, although I've made a number of 1440
> > curves.
> >
> > I'm not clear what the problem was that you encountered - you said that
> > after 70% black the L value went up (i.e. density decreased).
> Perhaps 70% is
> > a reasonable overall ink limit at 2880 dpi.
> >
> > You can use curves designed for 1440 at 2880 dpi by reducing the
> shadows by
> > about -45% in QTR when you print. I haven't checked the linearity of
> this
> > approach, though.
> >
> > HTH
> >
> > Tom Moore
> >
> >
> > > -----Original Message-----
> > > From: QuadtoneRIP@yahoogroups.com
> [mailto:QuadtoneRIP@yahoogroups.com] On
> > > Behalf Of isvibilsky
> > > Sent: Monday, October 03, 2005 12:15 PM
> > > To: QuadtoneRIP@yahoogroups.com
> > > Subject: [QuadtoneRIP] What is the proper way to use 2880 dpi?
> > >
> > > Hi,
> > >
> > > I found that my 2200 printer lays out too much black when I use 2880
> > > dpi resolution. Not sure this is only my printer or it is known fact.
> > > When I printed the ink separation page I was surprised to see the
> > > measured with eye-one values. After 70% black the L value started to
> > > go up. I was not able to build a curve and linearize it in that mode.
> > > However, everything works ok when I use 1440 dpi. Is there a way to
> > > use 2880 dpi?
> > >
> > > Thank you.
> > > Igor
> > > www.photographyforever.com
> 
> 
> 
> 
> 
> 
> Yahoo! Groups Links
> 
> 
> 
> 
>