QTR-Quadtone RIP

David,
Thanks for getting back to me. Sorry I got a bit ahead of my self.  
What I was supposed to do was make the profile from the ink descriptor  
file first. I filled out the ink descr. file, doing the partitioning  
of inks by percentage, and keeping shadow=8 & highlight=4.
I dropped it into 'Drop-Quad_Profile' & it put it into my quad 7800-K7  
folder with the rest of the profiles. But when I went to print the 21  
step wedge & apply this profile ( so I can add the linearize info to  
the bottom of my ink desc. file) it will not appear in the curve  
choices in the qtr rip print dialogue box.
Why is happening? It does have a .quad after it's name (I call my ink  
des. file 7800_k7), so I know it has been converted to a profile.
I'm close to understanding this, I can see it through the fog.
Thanks
Joel
On Mar 3, 2008, at 9:21 PM, dmwket wrote:

> Joel,
> There are several possible causes. Apparently, the droplet rejects  
> the file if there is not a
> steady progression from light to dark. If for example you have  
> printed a step wedge where
> the 90, 95 and 100 percent blocks are over-inked they may read a  
> lower dMax.
>
> This is why I have found that first I have to determine what  
> resolution and paper type to use
> to ensure the best dMax. For example, there is one paper I tested  
> that, when printed at 2880
> with PK ink on a 2200 the dMax was highest at about 60% and then  
> started to get lower
> again. When printed at 1440 the dMax was best at 100%, and as high  
> as the best reading at
> 2880.
>
> Also, I have found that it is best to read the step wedges with  
> several sheets of blank paper
> underneath. The paper, even heavy photo rag etc. is somewhat  
> transmissive and it may be
> that the spectrometer light is bouncing off the desk and causing a  
> problem.
>
> David
>
>
> 



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