QTR-Quadtone RIP

Right now I'm printing with matte black ink only at 1440x1440 dpi to 
create digital transparency "positives." I use these in an UV 
exposure unit to create etching plates from UV light sensitive film--
the dots of ink block underlying areas on the plate from being 
exposed and these develop differently than areas that are exposed to 
the UV light. 

My image on the transparency is made up of black dots only, similar 
to a bitmap image, and this creates the "bite" (low spots that hold 
ink) in the etching plate. The problem is that the matte black in 
does not adhere well to the transparency films I'm using and can be 
smudged with my finger. 

I have two solutions: to switch to photo black ink (which is less 
opaque than matte black) or to create the transparency using color 
inks, for example all magenta, or all cyan, or red or green. 

In essence, I'm trying to replace all my black dots of ink with all 
colored dots of ink that I hope will have similar or better UV-light 
blocking capabilities.   

The idea of using colored inks came from someone who uses them for 
digital negatives, and says they give better coverage than black 
inks. 

So I'm trying to find a way (see my settings below) to use color inks 
in place of the black only ink. 

Does that help explain it?  Best, David. 


--- In QuadtoneRIP@yahoogroups.com, "Olivier" <odesmais@...> wrote:
>
> > I'm going to still try using QTR to print in color, and here's 
what 
> > I'm thinking: 
> > 
> > For printing Magenta only: 
> >  * default ink limit: 85
> >  * black boost: blank
> > 
> > Magenta Ink
> >  * Density 100
> >  * Limit: blank 

> > Otherwise, no changes to gray or toner curves, and no 
linearization. (And I might repeat this, only using Cyan). 
> > 
> > For printing with Magenta and Yellow (to get Red), I'd do same 
settings for Magenta and repeat these settings for Yellow. 
> > 
> > I'll print at 1440x1440 super to get the dot structure I need for 
my etching plates. 
> > 
> > I have tried to understand QTR but mostly I'm baffeled by it all, 
so I'm sort of winging it (trying things without knowing what I'm 
> > doing).