QTR-Quadtone RIP

Howard,

Thank you again for the additional information. I'm starting to get a
little better feel for QTR. I have been playing around but so far
nothing seems to give me a significant increase in dmax. It could be
that I'm getting all I can out of this Innova paper. Perhaps I need to
order some paper that is known to have better dmax to start with.

Has anyone out there created curves for Innova Fiba-Print and UT2 inks
on a 1280? If so I would love to hear from you.

I did check the ink densities for black and found that they do max out
around 85% with a only a slight increase beyond that. So I'm assuming
that there is no point in setting a black boost beyond 85%. But that
value is over 1.7 and I'm only seeing about 1.61 for all my troubles.
I'm curious what approach the experienced QTR user would take from
here. Would you remove the overlap first? Is there a particular order
to changing settings that would be recommended?

Thanks for the help.

Scott

--- In QuadtoneRIP@yahoogroups.com, Howard Shaw <glassman@b...> wrote:

> This is a common problem and you will find various discussions relating 
> to dmax if you search through the archives. I would start by looking at 
> the overlap figure on the gray curve tab. In theory a figure of 0 for 
> overlap and 100% ink limit or black boost should give you exactly the 
> same black patch reading as the calibration page. Figures greater than 
> zero determine how much the inks overlap with each other including the 
> black & darkest grey overlap. In other words some dark grey will be
laid 
> down with the black. Sometimes this helps dmax, sometimes it worsens it.
> 
> Another thing to consider is whether the readings for the 70% - 100% 
> patches on the calibration page give you a consistent increase. If not 
> you may be over-inking the paper and cannot expect to get consistent 
> densities.
> 
> Howard
>