Digital BW, The Print

David Murphy <dm1000@...> wrote:

> ... is it possible to use QTR to print with all 6 cartridges? 

I missed your 12/27 post.

You're apparently using the UT-RC (260) inkset that I wrote up at 
http://www.paulroark.com/BW-Info/R260-BW-GS-Eps.pdf 

That inkset was made to be a very simple one with 2 levels of midtone 
density and 3 hues each.  I did not make QTR profiles for it, but it 
can be printed with QTR.

The problem you'll have with QTR if you use the standard profiling 
procedure is that you don't have 6 different density levels that QTR 
can sequentially partition.  There are several ways around this.

Probably the easiest way is to make a profile that uses only one 
light gray, one dark gray, and the K position inks.  Once that 
profile is done but before it's linearized, copy the light gray ink 
to the 2 other light gray positions and cut the ink limits to 1/3 
what they were for those inks. Copy the dark gray curve to the other 
dark gray ink and cut those 2 ink limits to half what the one was.  
This will use all the inks, but the cross-overs will be at the same 
places.  

If you see these cross-overs there are other refinements that can 
spread them.  But each refinement gets more complex.  So, try this 
approach first.

Hope this helps.

Paul
www.PaulRoark.com