Digital BW, The Print

Tyler,

I ran the LK at 100%, but limited LC and LM to get a neutral tone.  The 
wide format printers (4000, 7600, etc) put out a lot more ink so the 
limits would have to be adjusted down for them to avoid flooding the 
paper with ink.  Here is the "LK Only" profile for the 2200 if anyone 
wants to play with it.  It was linearized for Lexjet Pro Semimatte, but 
should work fine for most of the RC papers.

Carl

#
#  quadtone curve descriptor file
#
#
# the printer name
# the curve name
#   no spaces or special characters, except - or _  (dash or underscore)
#
PRINTER=QUAD2200
CALIBRATION=NO
GRAPH_CURVE=NO

#
# number of inks must be 4, 6, or 7
# the ink limits are percentages
#   usually they are all the same but they can be individually set
#
N_OF_INKS=7
DEFAULT_INK_LIMIT=100

LIMIT_K=0
BOOST_K=
LIMIT_C=0
LIMIT_M=0
LIMIT_Y=0
LIMIT_LC=25
LIMIT_LM=25
LIMIT_LK=

#
#  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=2
GRAY_INK_1=K
GRAY_VAL_1=100

GRAY_INK_2=LK
GRAY_VAL_2=100

GRAY_INK_3=
GRAY_VAL_3=

GRAY_INK_4=
GRAY_VAL_4=

GRAY_INK_5=
GRAY_VAL_5=

GRAY_INK_6=
GRAY_VAL_6=

GRAY_INK_7=
GRAY_VAL_7=

GRAY_HIGHLIGHT=4
GRAY_SHADOW=8

GRAY_GAMMA=1
GRAY_CURVE=

#
# Toner Partition Information
#
N_OF_TONER_PARTS=0
TONER_INK_1=
TONER_VAL_1=
TONER_INK_2=
TONER_VAL_2=

TONER_HIGHLIGHT=2
TONER_SHADOW=2

TONER_GAMMA=1
TONER_CURVE=

#
# Unused Inks
#
N_OF_UNUSED=2
UNUSED_INK_1=C
UNUSED_INK_2=M
UNUSED_INK_3=
UNUSED_INK_4=

#
# the following is a special UltraChrome ink flag it copies the
# light-black curves to the light-cyan, light-magenta and yellow inks.
# this insures that the LC and LM inks are used to directly neutralize
# the color of the light-black.
# the color balance of inks is controlled by the LIMIT_... values above.
#
UC_NEUTRALIZER=YES
LINEARIZE="0.039 0.073 0.104 0.145 0.192 0.234 0.299 0.353 0.417 0.485 
0.541 0.613 0.690 0.763 0.856 0.937 1.049 1.178 1.322 1.492 1.770 "


On Saturday, August 14, 2004, at 01:11  PM, Tyler Boley wrote:

> --- In DigitalBlackandWhiteThePrint@yahoogroups.com, Carl Schofield
> <scho@m...> wrote:
>> Tyler,
>>
>> I used a similar approach with QTR to get a neutral profile for RC
>> papers where it is difficult to cool down the very warm PK ink using
>> the partitioned method.  I just ran the LK, LC, and LM inks in 
>> parallel
>> across the scale without any partitioning.  Analogous to BO printing,
>> but without using any black ink.  The neutralized LK alone has enough
>> density to give a reasonable dmax without using any PK and the tone is
>> consistent across the scale.
>
> Clever, pretty cool what these new drivers will let us play with. All
> it takes is an inquisitive mind. I recall Culbertson doing some
> straight CMY tests with similar richness without K ink.
> Also worth noting your setup probably used up to 300% total ink
> without problems (I presume). Another example of letting that ink go
> down, don't be stingy with it!
> Tyler