QTR-Quadtone RIP

masseurwolfe wrote:
> Hi all,
> 
> I am a newbie using QTR for a novel application.  I work in a research 
> lab, and we're printing metals onto a piece of glass using MIS 
> refillable cartridges.  What I'm hoping to do is designate each 
> grayscale value (0 to 255) a combination of specified ink densities 
> from three cartridges.  From what I've been able to gather, I think 
> what I need is an ICC profile, but I may be wrong.  I'm not sure how to 
> construct this, since it won't be a linear setup at all.  Any ideas?
> 
> Thanks,
> Wolfe

If your goal is linear output: Basically none of the quad 
custom solutions discussed here are linear in output. The 
partitioning part of QTR should take care of a 3 partitioned 
ink system. For that you need a transmission densitometer 
that can cope with your metal image on glass (I guess it is 
transparent glass, kind of mask fabrication process ?) and 
apply the data you get from that meter to the method of 
partitioning and linearising as described in some docs for QTR.

If the process you are working on is intended to create 
images for humans then ICC profiling could be a next step 
after linearising the output. It will still be a tricky 
thing as I guess transmitted light will be the white of the 
image and the contrast range will be many times that of the 
usual (gloss) B&W print. More monitor like.

If the process has a totally other purpose like mask 
fabrication for chip lithography (over the top guess :-) 
then linear output should be enough and the best base to 
work with.

-- 
Met vriendelijke groeten, Ernst


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