QTR-Quadtone RIP

>
> No, the issue is I have no idea what the density and ink limit settings 
> do, and how they would affect two inks, for example, using only yellow 
> and cyan to try to make a red. As I said earlier, I'll try just setting 
> the ink density of both to 100 and leave the limit blank, and have an 
> overall default ink limit of 85. 
> 
> David. 
> 
 Hi David.
It might be helpful to just think of the limit as being the quantity
or volume of an ink that is put onto the paper or transparency, with
100% being the maximum you can put down, and the density as being the
maximum darkness of each ink. As you mentioned wanting the grainy or
dotty look since your use requires it, and given that you are Not
making reflective prints but rather an interpositive, I would think
that you would want the maximum limit, ie: 100% for both inks, at
least initially. Density can be ignored as you are trying to mix the
two inks at every point. You want both ink colors to be used over the
entire curve--not partitioned. Just call one color ink the K channel
and use the "duplicate the K curve" option for the other. You wouldn't
have to mess with changing the limit unless there was so much ink
being deposited that it runs or won't dry or something.

I also think it might be best for you, once you find the right color
to use ( not positive but I seem to recall something I read about an
orange shade being best, though one would think a yellow color would
be suitable), to simply mix the shade you need directly from bulk ink
and only use a one channel curve from QTR from that point on. That
would be the same as using the BO curve then. It also would have the
advantage that you would avoid the complications of all the technical
dot mixing that Olivier was talking about.

Regards
Duane