Digital BW, The Print

Jenny, 
Your numbers don't quite seem to make sense, but your point is
clear enough. When you do the partitioning, QTR will do what it
can to cover the range and make the transitions. Whether it is
smooth enough is really up to your eye. Remember that the 
curves that use K, and LK from the UC inkset have much worse
coverage of the whole range, and they still do very well. I think
you will work fine even if the densities are not optimal. The biggest
issue will be whether the hue of the different dilutions gives you 
a scale you like.

You can use the copy curves commands to play a lot of games.
For example you can use just one of the lightest grays in the
partitioning. Then copy its curve to the lightest gray of the
other set. You can balance the amount of each by the ink limits.
This will give you essentially a mixed ink so you can grade how
cool/warm teh highlights are.

The linearization will make the corrections to get you back to a
smooth curve. There is a lot of flexibility there. 

Costa

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "byushooter" <jellerbe@j...> 
wrote:
> I have read through the archives and emailed Roy about this but I am 
> still looking to see if there's any more advice out there.  I have a 
> 4000 loaded with Museum Black, 3 carbon sepia piezotones and now 3 of 
> the K7 inks.  Jon Cone suggested that I could split tone between the 
> warm tones (shadows/midtones) and neutral (highlights) by using 
> StudioPrint.  I am attempting to do that using QTR and am wondering 
> what the best method is.
> 
> I thought I would use the Museum K, the 2 darker shades of carbon 
> sepia, and the lightest shade of the K7 inks to build a quadtone 
> curve.  Looking at the Ink Pattern Page (at 100% ink limit), the 
> lightest K7 ink is much lighter than the lightest CS ink and has a 
> more limited range.  The lightest K7 has L* of 86.2 at 100% and the 
> lightest CS has L* = 58.4 at 100%.  K7 at 50% = 91.3 and the CS = 
> 72.9.  Now I am worried that the densities of the two lightest inks 
> are too different to give me a smooth transition using K7 instead of 
> CS.
> 
> Is there another way to do this using the toner curves?  Or maybe 
> using more than 4 of the inks to build the curve?
> 
> Any advice would be appreciated.  I am fairly new to all of this so 
> please keep your explanations as simple as possible!
> 
> Thanks,
> Jenny