Digital BW, The Print

CDTobie@... wrote:

> Ink fading is not a paper issue, unless a particular papers cause inks 
> to fade differently than other papers of that type in class, which is 
> not true of Entrada. Differential ink fading is a fact if life, but 
> yellowing indicates Cyan ink fading, not anything happening with the 
> yellow ink. I see no note of what inks you are using, but this is most 
> common with dye inks.
>
> C. David Tobie

I respectfully disagree. Ink and substrate/coating form a system, all 
parts effecting to a greater or lesser degree the other parts. The 
coating on a paper can have an effect on ink longevity. Particularly the 
porosity of the coating. This is particularly true of dye inks, but 
should also be true of pigments inks if to a lesser degree. The theory 
is that the coating can protect the ink from atmospheric pollution. The 
type of binder used in the coating can also effect ink longevity, as 
does the effective use of a mordant, again more for dyes than for 
pigments, but something one can not discount out of hand. I'm sure there 
are other factors as well, but I haven't seen any papers discussing 
them. Not that I'm spending a lot of time looking.
--
Bruce Watson