QTR-Quadtone RIP

Hi David. In QTR you have the option of matching the curve generated
for an ink with the curve from another ink in your description. It's
one of the check-offs in the Gui version. You always get some kind of
curve generated for each ink even before linearizing an ink set. That
is the reason I suggested calling both K and yellow inks density
100%.I believe that, and copying the K curve, would allow you to over
print the 20-25% yellow limit you wanted.

You could also just use the printers normal driver with color inks or
black only. You just have to fool it by adjusting contrast to avoid
solid coverage in your transparency. A gentleman e'mailed me
suggesting that he has been using the method for many years to make
etching transparencies with black only. He said we were making life
too difficult. Based on your latest e'mail I'm inclined to agree;)

QTR can do what you wish but there may be easier ways.

Regards
Duane

--- In QuadtoneRIP@yahoogroups.com, "David" <dkfreed@...> wrote:
> 
> The only part of your directions I'm not clear about is "copy it's 
> curve (yellow ink) from the K ink"? I'm not applying any custom curve 
> or linearization that I know of to the K ink, so what am I 
> transfering over?  
> 
> Best, David. 
> 
> 
> 
> --- In QuadtoneRIP@yahoogroups.com, "dlruckus" <dlruckus@> wrote:
> >
> > Hi David. As you have had no reply, I'll make a suggestion. No
> > guarantee comes with it;) Why don't you simply try an overall ink
> > limit of 100% with 0% boost. Limit your yellow ink to 25% and copy
> > it's curve from the K ink. Call both of them 100% density.Go ahead 
> > and print a scale and see what it looks like. Since you are actually
> > wanting a transparency, the usual d'max issues probably won't apply
> > here. You're just trying to get maximum transmission density so the
> > more ink the better. The issue you might have is the dot spread on
> > your transparency material if there is too much ink going down. Look
> > at it with a loop or magnifier to see if you have nice crisp dots. 
> 
> If not, lower the overall limit, slightly reduce the yellow limit and 
> try again. Repeat until it works for you.  Hope this is of some use.
> > 
> > Regards, Duane
>