QTR-Quadtone RIP

--- In QuadtoneRIP@yahoogroups.com, "Ron Faris" <shutterbug52@...> wrote:
> I am developing my own curves and ICC profiles for QTR and Epson
Velvet Fine Art for a 
> Epson 2200 printer.  Everything looks great except my 95 and 100
wedges are identical.  Can 
> anyone please tell me what is the best way to correct this problem.
 When I printed the 
> calibration page, I chose an ink limit of 65% black ...should this
be lower.  I tried boosting the 
> black and altering the shadow value neither of which made much
difference.  

I use an i1 spectrophotometer to help set the ink limit.  Between 70
and 100% ink limit, the i1 readings indicate that there is clipping or
even reversal for the matte black wedges.  At 70% ink limit, it's
still very difficult to visually distinguish between the 95 and 100%
wedges, but the i1 readings show a gradient.

I then use the 70% ink limit and go through linearization, after which
all the individual wedges are visible.