Digital BW, The Print

I have finally achieved some good success with QTR on my 2200 usint MIS UT inks.

The profile below gives me results that are very close to what I used to get with Piezotones 
on my 1160. before it went kaput.

The only thing is, the prints are pretty warm.

I need some advice from experienced users on how to increase the presence of cool toner.

The thing is, I am already using very high defalut densities and can't really increase the ink 
limit of M (the cool toner) that much.

I noticed that profies from other users have much lower ink limits than I seem to need to 
get a very dense black.

I just pulled a print with the M density set to 100 and it was a bit cooler.

Is my next step to use toner curves?

James Haney










#
#  quadtone curve descriptor file
#
#
# the printer name
# the curve name
#   no spaces or special characters, except - or _  (dash or underscore)
#
PRINTER=QUAD2200
CURVE_NAME=2200-UT-PR-neutral
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=90

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

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

#
# Gray Partition Information
#  use ink names: K,C,M,Y,LC,LM,LK
#
N_OF_GRAY_PARTS=4
GRAY_INK_1=LK
GRAY_VAL_1=100

GRAY_INK_2=C
GRAY_VAL_2=49

GRAY_INK_3=LC
GRAY_VAL_3=27

GRAY_INK_4=Y
GRAY_VAL_4=6.75

GRAY_INK_5=
GRAY_VAL_5=

GRAY_INK_6=
GRAY_VAL_6=

GRAY_INK_7=
GRAY_VAL_7=

GRAY_HIGHLIGHT=6
GRAY_SHADOW=6

GRAY_OVERLAP=
GRAY_GAMMA=1
GRAY_CURVE=

#
# Toner Partition Information
#
N_OF_TONER_PARTS=1
TONER_INK_1=M
TONER_VAL_1=100
TONER_INK_2=
TONER_VAL_2=

TONER_HIGHLIGHT=1
TONER_SHADOW=0.01

TONER_GAMMA=1

#
# Unused Inks
#
#N_OF_UNUSED=02
UNUSED_INK_1=LM
UNUSED_INK_2=K
UNUSED_INK_3=
UNUSED_INK_4=

#
# the following is a special UltraChrome ink flag
# it copies the light-black curves to the light-cyan and light-magenta 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=NO
LINEARIZE="0.04 0.11 0.19 0.29 0.37 0.46 0.56 0.63 0.71 0.79 0.87 0.95 1.01 1.07 1.12 
1.17 1.24 1.33 1.43 1.50 1.58"

I am replying to my own post so this gets tracked in the same forum.

I tired generating a curve to boost a little more of the cool toner into my slightly warm 
prints.

My results were a bit stronger than expected. The poor girl in the test image came out 
looking like papa smurf. HEAVY blue.

I made a curve that was linear and just gave it a healthy, but not obscene boost in the mid 
to 25% tones.

I saved it as "toner_curve_1.acv" refrenced it in the curve file 
"TONER_CURVE=toner_curve_1.acv" and made sure it was in the same directory as the 
profile.

When I ran the profile the terminal window posted this:

Enter Descriptor Filename or Drag file to window: /Volumes/Drive\ Two/CurveDesign/
Other\ Inks/2200-UT-PR-cool.txt 
usage: qacv filename.acv curvenum >curve.out
Creating curve 2200-UT-PR-cool for QUAD2200

I took a look at some elses curves and they reference a file called "toner-curve.raw" which 
is a raw photoshop file. There is a corresponding "toner-curve.acv" file that has a very 
unsual shape.

What do I need to understand about toner curve design, naming, and file formats?


James Haney

I believe the procedure for creating a toner curve is as follows.  Open 
the grayscale-16.psd file in Photoshop.  Go to Image>Adjust>Curves, 
click the load button and select Roy's toner_curve.acv file.  Click OK 
(or edit the curve if you wish) and then save the file in Photoshop RAW 
format.  You would then reference this raw file in the script as 
TONER_CURVE=toner-curve.raw

Also, your gray ink and toner ink limits seem to be quite high so you 
might want to try reducing them as well (eg. set C, M, Y, and LC all to 
60).

Carl

On Friday, July 23, 2004, at 11:34  AM, jhaneyzz wrote:

> I am replying to my own post so this gets tracked in the same forum.
>
> I tired generating a curve to boost a little more of the cool toner 
> into my slightly warm
> prints.
>
> My results were a bit stronger than expected. The poor girl in the 
> test image came out
> looking like papa smurf. HEAVY blue.
>
> I made a curve that was linear and just gave it a healthy, but not 
> obscene boost in the mid
> to 25% tones.
>
> I saved it as "toner_curve_1.acv" refrenced it in the curve file
> "TONER_CURVE=toner_curve_1.acv" and made sure it was in the same 
> directory as the
> profile.
>
> When I ran the profile the terminal window posted this:
>
> Enter Descriptor Filename or Drag file to window: /Volumes/Drive\ 
> Two/CurveDesign/
> Other\ Inks/2200-UT-PR-cool.txt
> usage: qacv filename.acv curvenum >curve.out
> Creating curve 2200-UT-PR-cool for QUAD2200
>
> I took a look at some elses curves and they reference a file called 
> "toner-curve.raw" which
> is a raw photoshop file. There is a corresponding "toner-curve.acv" 
> file that has a very
> unsual shape.
>
> What do I need to understand about toner curve design, naming, and 
> file formats?
>
>
> James Haney
>
>
>
>
>
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