Did you ever went to the paten office and look it the patens ?
As a company manager I have to do it time to time, I find close
to 67.000 ink patens and ink formulas. All of it claim something
different, but when I load all this formulas into a database
90% of it came out the same. Like Sieko Epson I wonder how they
ever get the paten paten # 6,111,265 that paten is full with
bull shit, in one section stateing the ink number the next section
they change it. They stateing with capital letter ULTRA PURE WATER.
Every body else say destilled, you can't get more pure water from
the destilled water. Any how on May 28,2002 they patened a other 
set of pigmented inks, same pigmented ink just like all the other
ones, I'm sure they will come out with some new story.
The other one is the HP. patens WOW. You should look it 6,281,269
If you know the chemicals you will see they listing up the same
chemical (same properties) with different name. After 14 companies
they list to get the chemicals from I quit counting.
They using the same dyes just like every one else.
I like the canon work horses, and read one of the canon paten
clear just like they products.

Inkgirl Corporation Tech.manager