QTR-Quadtone RIP

Obviously there are some established conventions for making curve sets and providing them to the community- Warm, sepia, etc etc... and it's easy to see what inks were used to make each of these. 
I'm wondering if there have been any loose targets set to try to hit with each one, to keep consistency amongst the available curves from printer model to printer model...
Anyone know, or is it purely approximate, visual..?
I'd like to design some that suit my needs, and then make them available if successful, and they might as will meet the established conventions so they are most useful to other users.
Thanks,
Tyler

I've generally gone off of Roy's curves using them as standards (they  
are very similar to each-other from printer to printer) (Warm/Cool/ 
Cool-Sepia/Sepia)  But then I've created Warm-Sepia and Neutral.  
Neutral is never that perfect, however, so I've always had to tone  
with either cool or warm (or both) to get the print looking good. So  
when I build QTR color curves I also like to create  
custom.presets.plist files�for OS X�(and of course Create ICC  
profiles) to go along with them. Because all the paper bases are so  
different I think it would be pretty hard to create specific LaB  
standards, but my goals have always been a visual approximation of  
either Roy's QTR AB values or Jon Cone's Neutral/WN/SL AB values.

Walker


On Feb 9, 2010, at 12:31 PM, tboleyyh wrote:

> Obviously there are some established conventions for making curve  
> sets and providing them to the community- Warm, sepia, etc etc...  
> and it's easy to see what inks were used to make each of these.
> I'm wondering if there have been any loose targets set to try to hit  
> with each one, to keep consistency amongst the available curves from  
> printer model to printer model...
> Anyone know, or is it purely approximate, visual..?
> I'd like to design some that suit my needs, and then make them  
> available if successful, and they might as will meet the established  
> conventions so they are most useful to other users.
> Thanks,
> Tyler
>



[Non-text portions of this message have been removed]

Thanks Walker, big help. I'm still trying to find how to make curves from scratch here.. giving it five minutes every 2 years just ain't cuttin' it...
Tyler

--- In QuadtoneRIP@yahoogroups.com, Walker Blackwell <forums@...> wrote:

>
> I've generally gone off of Roy's curves using them as standards (they  
> are very similar to each-other from printer to printer) (Warm/Cool/ 
> Cool-Sepia/Sepia)  But then I've created Warm-Sepia and Neutral.  
> Neutral is never that perfect, however, so I've always had to tone  
> with either cool or warm (or both) to get the print looking good. So  
> when I build QTR color curves I also like to create  
> custom.presets.plist files—for OS X—(and of course Create ICC  
> profiles) to go along with them. Because all the paper bases are so  
> different I think it would be pretty hard to create specific LaB  
> standards, but my goals have always been a visual approximation of  
> either Roy's QTR AB values or Jon Cone's Neutral/WN/SL AB values.
> 
> Walker
> 
> 
> On Feb 9, 2010, at 12:31 PM, tboleyyh wrote:
> 
> > Obviously there are some established conventions for making curve  
> > sets and providing them to the community- Warm, sepia, etc etc...  
> > and it's easy to see what inks were used to make each of these.
> > I'm wondering if there have been any loose targets set to try to hit  
> > with each one, to keep consistency amongst the available curves from  
> > printer model to printer model...
> > Anyone know, or is it purely approximate, visual..?
> > I'd like to design some that suit my needs, and then make them  
> > available if successful, and they might as will meet the established  
> > conventions so they are most useful to other users.
> > Thanks,
> > Tyler
> >
> 
> 
> 
> [Non-text portions of this message have been removed]
>