Digital BW, The Print

'dyes' are soluble 
> and 'pigments' are insoluble.

That's true for Epson "pigments" vs the various dyes and inks in
printers, but "pigment" simply means colorant: the stuff from which
dyes and inks are made. The word is being used inaccurately by Epson,
but perhaps it's easier than explaining "encapsulation."

Ultrachrome "pigments" are different from dyes because they are
"encapsulated" and in "suspension," not "dissolved" in a "solvent". By
contrast, dyes and inks ARE in their solvent, which is usually water.
This is said to explain Epson's arguably more archival characteristic,
and it probably explains bronzing. 

 


> 
> http://pffc-online.com/mag/paper_brief_chemistry_lesson/
> 
> Bob Frost.
> 
> 
> 
> ----- Original Message ----- 
> From: "dlruckus" <dlruckus@y...>
> 
> 
> 
> 
> Can't make a dye of anything larger than a molecule of carbon. Get 2
> of them and it becomes a clump and -that-- is a pigment.