QTR-Quadtone RIP

Howard,

The LK curve does not seem to be in the correct position- it should  
fall between the Y and LM curves.  I'm using the 2400, so perhaps ink  
assignments are different?

Carl

On Jan 16, 2007, at 5:44 PM, Howard Shaw wrote:

> 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
>>