Digital BW, The Print

James

Roy will probably chime in but let me see if I can help you a bit.

The file you want to use is called inkseparation.psd and is an RGB file.
When you print it make sure that you are using a curve which has the setting
CALIBRATION=YES.  This produces a curve with a calib suffix.  You also must
go to Printer Features in the driver and then Quadtone RIP Settings and
select Quadtone RIP Calibration.  I am not sure about your second question
but the basic process here is to choose which inks are going to be
partitioned to create a gray scale (eg your black, light black etc).  The
first step is determine ink limits which essentially are percentages at
which point you say I have enough ink for good paper coverage (on the 2200
these are normally quite high).  Ink Separation.psd is printed to determine
this phase and then again with the ink limits set.  Then you do the
partitioning by essentially looking to see at what density the 100 patch of
the next lightest ink kicks in at.  For example, if patch 100 of light black
(being the position where your next lightest ink is placed) has a density
between that of the 55 and 60 of black then the GRAY_INK_2=LK, GRAY_VAL_2=57
(by interpolation).  QTR then takes all this info and calculates a curve
(Calibration now = NO ie it is only set to yes when you are printing Ink
Separation.psd).  The final step is to linearize this info by printing a 21
step wedge and following the instructions if you have an Eye-One.  You can
get a visual impression of what the final curve looks like by running
Graph-Curve and dragging the .quad curve into the terminal window and
hitting return.

Steve


From: James Haney <jhaney@...>
Reply-To: DigitalBlackandWhiteThePrint@yahoogroups.com
Date: Mon, 19 Jul 2004 23:33:31 -0500
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: [Digital BW] Help setting up QTR on 2200

To anyone with experience with QTR on a Mac Epson 2200 UT inkset (not
UT7)

I have been having lots of problems getting setup some of them based
upon the fact that MIS sent me mis-filled ink carts. Some tech issues
getting CUPS to work on my computer with Panther.

So, everything seems to be installed and working, but the prints are
way off from what I am used to seeing with Piezography.

I am using the UT-MK curves.

The blacks are very weak (1.31)

I am trying to follow the documentation to do a calibration but it
seems to have several inconsistencies:

1) The documentation says to use the pattern test page "inkpattern.psd"
but there is no such file included in the installer. The documentation
says that the file is a cmyk file. I found a file called
inkseparation.psd and inkseparation.tif but these are both RGB files.

I tried to print them anyway but the prints were missing lots of
patches and contained no text.

I just downloaded the old beta 8 installer and sure enough the file is
there, I will try it with that.

2) What is meant by the line " QuadTone RIP Curves is whatever curve
set you want to split up into separate inks?"

Any help getting through this would be GREATLY appreciated. My 1160
with Piezo is not working and I keep getting the blue selenium problem.

I am on a MAJOR deadline to get some prints out the door for a customer
by Friday.

Thanks in advance.

James Haney



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