QTR-Quadtone RIP

Please excuse me if this seems an obvious question.  When looking for a 
suitable densitometer for use with QTR, will any densitometer do?  Can a 
black-and-white only densitometer be used to create suitable profiles, 
or must it be a colour densitometer?

Terence Lowe.

Hello Terence,

I recently started with QTR and discovered that I desired to go beyond
the canned profiles (which by the way worked fine enough) to make my
output calibrated to my equipment. I got an X-Rite 810 densitometer
from a seller on Ebay and was very satisfied with it. Now  I have
included Color in my photographic world, I bought (also from and Ebay
seller) PrintFixPro by Colorvision. I can also use it for reading BW
densities also. One of our members has uploaded to the files section
an Excel spreadsheet to convert the readings to a text file that can
be plugged into the tools with QTR for creating your personal curves
for your ink/paper combinations.

Your friend in Photography,

Johnny Eades




--- In QuadtoneRIP@yahoogroups.com, Terence Lowe <televe@...> wrote:
>
> Please excuse me if this seems an obvious question.  When looking for a 
> suitable densitometer for use with QTR, will any densitometer do? 
Can a 

> black-and-white only densitometer be used to create suitable profiles, 
> or must it be a colour densitometer?
> 
> Terence Lowe.
>

The simple answer to your question is that yes, most any densitometer
that reads reflected densities will do.  There are lots out there on
e-bay, and virtually all of them will do the job.  Even an old analog
readout would do.

It is possible also to do this with a scanner.  However, you just
about have to use a standard BW stepwedge calibration target in every
scan to get even semi-reliable results, and even then you end up doing
a fair amount of manipulation to get smooth and predictable results in
your printed results.

Once you get the hang of it, producing new curves with the help of a
densitometer is pretty easy.  The hard part that I found was figuring
out how to tweak the individual ink curves, in order to get close
enough that linearization would work.

Hope this helps,
Dave Keasey

--- In QuadtoneRIP@yahoogroups.com, Terence Lowe <televe@...> wrote:
>
> Please excuse me if this seems an obvious question.  When looking for a 
> suitable densitometer for use with QTR, will any densitometer do? 
Can a 

> black-and-white only densitometer be used to create suitable profiles, 
> or must it be a colour densitometer?
> 
> Terence Lowe.
>