QTR-Quadtone RIP

Hi,
I've posted this a while ago but got no reply; does anyone have a 
suggestion about a "starting point" QTR curve for using Ultrachrome 
(K2) inks on Epson Premium Semimatte with a 7600? I'm having some 
trouble adjusting the ink parameters for a 'cool' curve: the 21-step 
image prints with very non-even densities, mainly in the mid-gray tones 
(60-80%), and the 100% patch is noticeably lighter than the 95%. I 
suspect the trouble may lie on the LC/LM ink limit settings (I'm using 
a default LIMIT_LC=27, LIMIT_LM=27, LIMIT_LK=56, and the overall ink 
limit is set at 40%). A warm curve prints and is linearized OK.
Thanks for any help,

Paulo Baptista


On 08/06/2006, at 14:46, Laboratório de Documentação Científica wrote:

> Hi all,
> I'm trying to use QTR on our 7600 with UC inks to print on Epson
> Premium Semimatte paper, and I'm having some trouble setting the curves
> parameters right. Does anyone have a sugestion of a downloadable curve
> that would be suitable for this setup, or at least that would work as a
> starting point? Thanks for any help.
>
> Paulo Baptista
>
> Laboratório de Documentação Científica
> Escola de Belas Artes
> UFMG
> ldc@eba.ufmg.br
>