Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, Clayton Price
<clay@...> wrote:
> 
> That said, there are some errors in Mantinieri's logic -   								
>First is Silica - one of the more stable compounds  
> around - Silicon Dioxide (basically sand, and the major ingredient of  
> glass).  It's formula, SiO2 already has the maximum number of Oxygen  
> atoms possible, and really doesn't react with the paper. 

Hi Clayton.
I took what he said to mean that the silica absorbed pollutants from
it's environment and held them, much as something like activated
carbon would do, thereby keeping them in contact with the inks for
extended periods and causing ongoing damage.

> 
> Perhaps there's  
> some chemical reactions, but if the inks are truly pigments, the  
> chances are they remain mostly archival and stable. 
> 

I think the literature refers to current pigments used in inkjet inks
as dye stacks in the technical sense. ie:more stable forms but of the
same or similar chemical compositions as the soluble dye forms. They
are not at all the same as mineral pigments used in centuries old
paints. The pure carbons would be the exceptions of course.


								Regards
Duane