QTR-Quadtone RIP

Thanks Roy -- finally, the answer! Its just a guess on my part, but I'm wondering if the random dot placement of inkjet printers is why they don't print bit-map images all that well, and often print them very dark? (And why I'm having so much trouble getting the results I want)

best, david  


--- In QuadtoneRIP@yahoogroups.com, Roy Harrington <roy@...> wrote:
>
> Hi David,
> 
> The only way to get specific ratios of two inks is to mix the inks by hand and load the
> mixture into one of the ink carts.  The printers only output up to 3 different ink drop sizes so the printer itself can't do what you are asking for.  Inkjet printers in general use dithering to get multiple levels -- your eye does the averaging of a larger area
> than one ink drop.
> 
> QTR doesn't have a way to correlate positioning of different inks.  In
> fact the idea is just the opposite -- eliminate dot patterns by more randomness of dot placement.
> 
> Roy
> 
> 
> On Wed, Nov 25, 2009 at 10:00 AM, David <dkfreed@...> wrote:
> > Thanks again Joost.
> >
> >
> > Getting back to my original question, I'd still like to know the settings/curves in QTR, so that each dot of ink laid down is a certain mix of two color inks, say magenta and yellow, or cyan and magenta; so if I printed a bit mapped image the dots of ink would be this color combination, bit the spaces in between would be blank.
> >
> > Best, David.