Digital BW, The Print

With regard to archival qualities, I recently took advantage of an Epson
offer and an InkJetMall offer to acquire an Epson 1400 and a Piezography
CIS kit.

Regarding archival qualities, view this page on the InkJetMall site:

http://shopping.netsuite.com/s.nl/c.362672/it.I/id.38/.f?sc=15&category=242

Bill Parsons


----- Original Message Follows -----
> Mantinieri wrote, in part:
> 
> > If you ever visited Italy, you probably noticed that any 
> > church older than 100 years has a room where older documents, 
> > often related to a Saint or to some religious activities, 
> > are displayed. No matter how well those old documents are 
> > conserved, usually behind thick glass and
> > illuminated by controlled artificial light, they show signs of
> > deterioration, at the very least with yellowing of the paper and
> > deterioration of the structure of the medium. 
> 
> On the other hand, there are papers that are more than 500 years old 
> that look pristine.  Museums like the Getty in L.A. have very old 
> books with beautiful white pages and vivid images.
> 
> What accounts for some papers lasting many centuries and others 
> deteriorating?  
> 
> The findings of one study group of experts looking at 
> the "Composition and Condition of Naturally Aged European Papers," 
> noted:
> 
> "... there is a belief that certain constituents such as gelatin 
> content, pH, degree of beating, trace metal content, and fiber type 
> may play important roles..."
> 
> The two factors that seemed to correlate well with good longevity 
> that this group focused on most were: 
> 
> "... high pH values (pH = 7.0–9.9)...
> 
> "... sheets with high gelatin content (6–12%) all had high pH ..."
> 
> See http://aic.stanford.edu/meetings/abstracts/bpg_abstracts.html
> 
> (Scroll about 1/3 down the document to get to the "Composition and 
> Condition of Naturally Aged European Papers" abstract.)
> 
> This seems to be consistent with the composition and reputation of, 
> for example, the Arches Hot Press (un-coated) water color paper.
> 
> 
> 
> Paul
> www.PaulRoark.com 
> 
> 
> 
> 
>