QTR-Quadtone RIP

Hi,

I found that my 2200 printer lays out too much black when I use 2880
dpi resolution. Not sure this is only my printer or it is known fact.
When I printed the ink separation page I was surprised to see the
measured with eye-one values. After 70% black the L value started to
go up. I was not able to build a curve and linearize it in that mode.
However, everything works ok when I use 1440 dpi. Is there a way to
use 2880 dpi? 

Thank you.
Igor
www.photographyforever.com