Digital BW, The Print

"Alumina" is aluminum oxide (Al2O3). Here is a link with some  
information: http://en.wikipedia.org/wiki/Aluminium_oxide

It's pretty stable stuff. I've used it as a chromatography stationary  
phase. In this technique, one passes solutions of mixtures of organic  
compounds though a column packed with the stuff. The solutes are  
differentially absorbed which allows their separation as the solvent  
passes through the column. A wide variety of organic solvents can be  
used. Among other things, this indicates its general inertness to  
organic solvents. It normally doesn't cause problems for the solvents  
or solutes used in this process either.
Here's a reference to that process in the event that you're curious:  
http://en.wikipedia.org/wiki/Column_chromatography
Whether the stability of the alumina translates into stability of an  
image printed on this paper is another matter, about which I have no  
direct knowledge. However, I've tried the Harman Gloss FB Al paper  
(Epson 3800) and I like it.




On Oct 6, 2007, at 1:58 PM, t_j_l_s wrote:

>
> Most aluminum compounds are rather chemically active. Does anyone  
> have an opinion on
> what to expect in terms of print permanence from papers like the  
> reportedly wonderful
> looking new Harman that uses an "Alumina" coating to control ink  
> absorbtion?
>
> Thor
>
>
>


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