Digital BW, The Print

Nij,

I have only a small amount of knowledge in chemistry. I understand to
bonding a dye molecule to a pigment molecule would alter the
characteristics of either principal. I have read that this is what
EPSON does and I do not believe it. I read somewhere on the Internet
also that EPSON claimed they "encapsulated" a pigment particle with
dye and I did not believe this either. Because dye is soluble it
would remove itself when mixed with a fluid. I am not a chemist so I
do not know first hand how these mixtures are made. But aren't the
claims intimidating? Yes I think so as to what average person will
question molecules.

:)  If it doesn't fade I am happy. 
:) :) If it doesn't shift color I am happy happy. 
:) :) :) If it doesn't fade or shift color I am happy happy happy!
:) :) :) :o If it doesn't fade or shift color or clog I am happiest!

-Della


--- In DigitalBlackandWhiteThePrint@y..., "Nij" <nigel@m...> wrote:
> Hi Della,
> 
> You don't ask easy questions do you!
> 
> In my own terminology there are two or more types of pigmented inks
- those
> where dyes are bonded on to a pigment particle, and those where the
pigments
> are suspended in a fluid that has a dye in it. I suspect that
Generations
> Enhanced inks come under the former category, apart from the black,
which
> also has a 'dye' component which I suspect is fluid, and so comes
under the
> latter category. I believe Piezo BW inks may also have the 'fluid'
dye
> component.
> 
> Printing with Piezo BW, the prints turn very warm (on SVEnhanced).
This
> suggests to me that the dye element moves through the paper coating
and into
> the paper, and the carbon pigment does not. Thus leaving the
'brown' carbon
> pigment visible. I suspect something similar would happen for any
ink where
> the dye is fluid.
> 
> That's what I currently believe anyway!
> 
> Nij
> 
> 
> 
> 
> 
> > -----Original Message-----
> > From: dellaellingson [mailto:dellaellingson@y...]
> > Sent: 13 February 2002 01:30
> > To: DigitalBlackandWhiteThePrint@y...
> > Subject: Re: [Digital BW] Printing to Somerset Enhance Velvet
> >
> >
> > Nij,
> >
> > What about inks which have dye and pigment. It is my
understanding to
> > which pigmented inks are composed this way. Would the dye from a
> > pigmented ink fade leaving behind the pigment? What would this
do? Do
> > you know how much dye there is in relation to pigment in a
pigmented
> > ink? Does the color shift when this happens?
> >
> > -Della