QTR-Quadtone RIP

Hello,

I am printing with an Epson 3800 loaded with UC K3 ink.
After determining the ink limits and crossovers I printed a 21 step wedge in order to linearize it. For printing the wedge I have chosen the HPhotoRag-neut raw curve.
Unfortunately the highlights do have a green tint.
Also, the Dmax I reach is 1,51. According to Clayton Jones' website he measured a Dmax of 1,62 for the same ink/paper combination...

http://www.cjcom.net/articles/digiprn5b.htm#Soft Textured Art

I am not that experienced with QTR. So I appreciate any suggestion that may improve my results.

Stephan


Here's my curve so far (before linearization with ink limits and crossover values):

#  QuadToneRIP curve descriptor file
#
#  for ultrachrome k3 inks

N_OF_INKS=8
DEFAULT_INK_LIMIT=50

LIMIT_K=50
BOOST_K=55
LIMIT_C=5
LIMIT_M=3
LIMIT_Y=0
LIMIT_LC=6
LIMIT_LM=8
LIMIT_LK=37
LIMIT_LLK=35

#
#  Describe Usage of each Ink: K,C,M,Y,LC,LM,LK
#    All Inks of Printer must be listed
#

#
# Gray Partitioning Information
#
N_OF_GRAY_PARTS=3
GRAY_INK_1=K
GRAY_VAL_1=100

GRAY_INK_2=LK
GRAY_VAL_2=28

GRAY_INK_3=LLK
GRAY_VAL_3=9

GRAY_INK_4=
GRAY_VAL_4=

GRAY_HIGHLIGHT=6
GRAY_SHADOW=6

GRAY_GAMMA=1
GRAY_CURVE=

#
# Toner Partition Information
#
N_OF_TONER_PARTS=2
TONER_INK_1=C
TONER_VAL_1=100
TONER_INK_2=LC
TONER_VAL_2=30

TONER_HIGHLIGHT=6
TONER_SHADOW=6

TONER_GAMMA=1
TONER_CURVE="0;0 25;23 50;41 63;55 75;70 85;85 100;100"

N_OF_TONER_2_PARTS=2
TONER_2_INK_1=M
TONER_2_VAL_1=100
TONER_2_INK_2=LM
TONER_2_VAL_2=25

TONER_2_HIGHLIGHT=6
TONER_2_SHADOW=6

TONER_2_GAMMA=1
TONER_2_CURVE="0;0 23;20 50;45 63;60 75;77 100;100"