Digital BW, The Print

What is printed on the label on your cartridge?  Not sure I understand the
colour chip simulation.  The colours I see seem to bear no resemblance to
what I see in the printout...left or right side....


From: Carl Schofield <scho@...>
Reply-To: DigitalBlackandWhiteThePrint@yahoogroups.com
Date: Sat, 7 Feb 2004 09:29:46 -0500
To: DigitalBlackandWhiteThePrint@yahoogroups.com
Subject: Re: [Digital BW] Epson 2200- need to print black and white..

Hi Steve,

This is very strange indeed.  We seem to be dealing with two completely
different inks.  The LAB data for my Epson PK printed BO on Epson
premium semigloss are very different from your data.  For example, at
the 50% patch my ink reads L=55.39, a=1.95, b=4.04 and your data for
the 50% patch are L=58.55, a=-0.84, b=-5.65.  The Lab a values vary
along the red to green axis, with positive values tending towards red
and negative values towards green.  The Lab b values vary along the
yellow to blue axis with positive values tending towards yellow and
negative values towards blue.  So, my data for PK at 50% indicate a
warm tone based on the positive values for both a and b whereas your
data indicate a decidedly cool tone based on negative values for both a
and b.  If you want a visual interpretation of these numbers go to the
color calculator link below and plug in the Lab data (select D50
illuminant, 2 degrees observer,  and CIE-L*ab color space first) and
click start.  You will get a table of the data converted to other color
spaces and a color chip simulation for that patch.

http://www.easyrgb.com/calculator.php

Carl




[Non-text portions of this message have been removed]