Digital BW, The Print

My interpretation of these terms was that they distinguish the size of the "colorant" 
molecules which in "dyes" are smaller and more fluid and break down more easily when 
exposed to uv and blue radiation, while "pigments", larger more stable molecules, have a 
much tighter bond. When you start to mix them that's when things become slippery. Not 
to beat a dead horse and it isn't that important really, but there must be some chemist 
who has written a description of the major products out there. Maybe not. I'm sure they all 
vary from company to company, sometimes probably quite a bit, like the encapsulation 
chemestry that Epson has a patent on , etc.  I'm sure all these companies play it close to 
the vest to protect their own hard work and r and d expenditures.

John



-- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Djon" <westsidemaurice@y...> 
wrote:
> 
> It's not a dye or pigment or formulation.  Epson confuses the matter
> by calling it "pigment" but they do that to distinguish it from
> everything else that's out there.
> 
> A pigment is just a colorant, it's in dye and ink. 
> 
> What's distinctive about Ultrachrome is the pigment's encapsulation.
> None of the competing products are encapsulated.
> 
>  
> > would really publish the exact formulation?
> >  y 
> > ==a hybred inkset composed of some dye and mostly pigment, or