QTR-Quadtone RIP

Joost

If you have a look at the Cone-made k7 curves (the 2880dpi ones) they 
are differently constructed to the type of curves that qtr makes.

I've made a web page showing the difference and also how the Load curves 
facility in qtr can be used to emulate the type of curves produced by 
Cone's proprietary method.

http://www.howardshaw.org/docs/k7-qtr/k7curves.htm

The main difference is that the normal qtr curve creation method using 
density boundaries usually only allows 3 inks to overlap at a time 
whereas the Cone curves have upto 5 overlapping inks. On the basis that 
the more jets firing the better this should lead to a smoother print.

Note that I do not have the K7 inks so this is a technical exercise only.

Howard

Joost Horsten wrote:
> --- In QuadtoneRIP@yahoogroups.com, "Scott Schroeder" <schrochem@...> 
> wrote:
> 
>> I didn't mean you couldn't make curves. I was just saying you can't
>> make curves that have the nice transitions and crossovers that are 
> in
>> the supplied curves.
>> This message will explain it better:
>> http://tech.groups.yahoo.com/group/QuadtoneRIP/message/1165
> 
> Thanks Scott, that explains your remarks indeed. But for my 
> information: does it make in practice REALLY any difference whether 
> you use these original PiezoBW curves in stead of making your own 
> curves with QTR? Since I'm printing on 2880 dpi with QTR/2100/UT3D 
> I've a hard time to find any grain in my prints. So, imho on that 
> aspect I expect there is little left to improve by going to 7 inks. 
> But even if so, do the details of the curve then still make a 
> difference on top of that? Or does the claimed smoothness of the NK7 
> inks ONLY appear with the custom PiezoBW curves? 
> 
>  Joost
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> Yahoo! Groups Links
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