Digital BW, The Print

--- In DigitalBlackandWhiteThePrint@y..., SKID Photography 
<skid@b...> wrote:
> antonisphoto wrote:

(snip)
> >
> > Does reflecting all this UV make a paper more or less archival?  
More
> > because UV is not absorbed, or less because the brightners will 
kill the paper
> > in due time.
> > Too bad EAM is relegated to proofing paper.Without the 
brighteners it may
> > have been a better color match to the piezo inks and unbeatable 
for the price.
> > But now it just acquired a whole new (dark)life!
> >
> > Antonis
> 
> Actually, I think the glowing is a sign of the instability caused 
by the optical brighteners.  The act of the
> 'fluorescing' is actually the OBs breaking down and being used 
up.  :- )
> 
> Sorry I wasn't there for the event, would have loved to have seen 
the glowing prints.
> 
> 
> Harvey Ferdschneider


Antonis, Harvey,

From Robert Reed of Crane Papers posts earlier this is exactly what 
happens. There is a chemical reaction that takes place in the OBA's 
causing them to emit light in addition to what they reflect. Once 
exhausted the paper will appear to have yellowed. Paul Roark has 
noted this in his fade testing.

Robert was going to check with Crane's brain trust to see if the 
OBA's did anything bad once they were consumed but I don't recall any 
info on this.

Martin