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QTR-Quadtone RIP

Index last updated: 2026-04-28 23:12 UTC

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Re: Observations of interest to QTR users

2009-02-10 by dpgoldenberg33

Randy,
   Thanks for sharing your experience and interesting observations. It
does seem odd that you get a higher density using the dilute PK inks,
but perhaps it is possible that laying down the same amount of pigment
in a larger volume of dilute ink gives a different reflectance than a
smaller volume of concentrated ink.

I would also note, though, that it may be quite difficult to measure
differences in reflective density greater than 2.  The difference
between 2 and 2.3 is the difference between 1% of the light striking
the print being reflected and 0.5% reflected.  This could be very
sensitive to the angle of reflectance and other factors. But, if you
can see it and you like the difference, then that is what matters!

David







--- In QuadtoneRIP@yahoogroups.com, "Randy Rancier"
<randy_rancier2004@...> wrote:
>
> I have been very busy the last couple of weeks learning some of the
idiosyncracies of QTR 
> that I think could possibly be of interest to many, because some of
the things I learned 
> were surprises to me.
> 
> 
> What surprised me after printing the inkseparation wedge at 100% was
and taking many 
> density readings was that I was getting a higher dmax readings with
the DILUTE Cool and 
> Warm PK inks rather that the expected UN-diluted Cool and Warm PK
inks.

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