Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Reinier van der Ryst" 
<rvdryst@t...> wrote:

> Why not go the whole way with the hextone printers - using the UT inks.

Hi Reinier,

For the newer 6 ink printers, I think that would work well.  But my older
7500 doesn't have variable dot sizes, so to get dotless grays I think
the three light,medium,dark grays are desirable.

> 
> Keep the three colours seperate, but add a little gray to them so that it
> makes up for not having a light gray. In this way you can combine two
> colours to get the tone you want. ( Y and m will give a sepia/brown
> and m and c will provide a blue.)
> 
> 16%  7600 Y   or   7600 M   or   7600 C
> 16%  7600 LK
> 68%  7600 Base
> (NB - The base is the 7600 base which is a light tea colour - NOT the
> colourless.)

Have you tried these dilutions?  They seem pretty dilute, my thought
would be to go with the standard yellow, light cyan and light magenta.
Putting gray ink in as well would require more ink to get color, so I'm
not sure that's necessary.

> 
> Then I suggest using it as follows:
> 
> Position       Ink
> K                UT-HEX-K  (Eboni)
> C                UT-HEX-C   (dark gray)
> M               UT-HEX-M   (middle gray)
> Y (y?)         light yellow - from above
> c                 light cyan - from above
> m                light magenta - from above
> 
> In this way you can have any tone - period. I think the gray mixed in with
> the colours would also tend to mask metamerism!?
> 
> Roy, can QTRip handle this without modification.

The internals can do it, but I'd probably have to add more toner
curves.

> 
> My teaching workload and my 1160 that stopped working kept me away
> from working on QTR. I had Gimp-print 4.3.18 going under Linux and was
> waiting for UT inks when my 1160 stopped. (The cost to fix it is more than
> half the price of a new 1160.) Within the next two weeks I hope to get a
> 1290 and the I want to go to Gimp-print 4.3.21 to get the new improvements.
> (See the attachment for the improvements that interest me.)

QTR uses its own gimp-print so just compiling and installing 4.3.21 would
have no effect.  I have been tweaking the version I have for some of the
same improvements.

> 
> Reinier van der Ryst
> 

Roy