Digital BW, The Print

The dirty little secret I heard is that ALL plastics have some u.v. 
filtering, more so to protect the plastic itself from breaking down than 
to protect what's behind it. Acrylite (and I suppose Plexi and others) 
in the normal grades filter a good deal of u.v., possibly over 80%, but 
the more exotic museum grades filter as much as 98% but for a high price 
differential that puts it out of range for anything but museum use.

What people have asked me recently is which products are more 
environmentally friendly, glass or acrylic?
 I'd assume glass, but I'm not so sure.

----- Original Message ----- 
From: "mrgs1001" <mrgs1001@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: Sunday, August 29, 2010 8:27 PM
Subject: [Digital BW] Re: no glass vs. glass vs. plexi: which shows 
carbon print at its best?


Glass and acrylic both have some decent filtering and protection 
including UV that is why any time you see quotes about paper and ink 
longevity they are always quoted for images that are behind glass.

--- In DigitalBlackandWhiteThePrint@yahoogroups.com, "Paul" <
> That's pretty much what I suspected - and - the comment I hoped to 
> hear! Thanks very much. In one of Mark's pdfs he mentions using 
> "ordinary glass picture frame glazing" and that it simulates "standard 
> acrylic glazing" - these terms imply to me these materials have no UV 
> filtering.