Digital BW, The Print

My PK cart label has (on top) T0341 Photo Black, made in Japan.  On the 
side it reads EPSON, T0341, Photo Black, Do not remove this label.  
Portions copyright symbol 2001, Seiko Epson Corporation.

On Saturday, February 7, 2004, at 10:10  AM, Steve Kale wrote:

> 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
>