Digital BW, The Print

On 11/05/2013 12:06 PM, David Kachel wrote:
> /I had a conversation at the Photo Plus show in NY about Oba's and the
> funny thing is UV is something you don't want your prints to be exposed
> to but that's how you get the full effect with Oba's. Food for thought./
>
>
> The insanity doesn't stop there\ufffd
> Fine art photographers are careful to have their OBA containing prints
> framed with UV glass so that UV will never get to the OBA's.
> Stupid, huh!
>
>
> David Kachel

No Fibre/Baryta paper but the Epson Hot and Cold Press Bright matte 
papers have an OBA content that stands time better. Two of the very few 
OBA papers that have that quality. The sadly no longer distributed Canon 
(USA) Heavyweight Satin Photographic RC 300 gsm showed something of that 
quality too.  In that case it could be wise to use a museum glass that 
is more translucent for UV than the normal frame glasses are, not to 
mention UV-cut glass. Whether there is enough UV in the display light 
and ambient light for the OBA effect is another matter. Normal window 
glass already cuts UV from daylight to a degree. Other factors that 
degrade image colors and OBAs are visible light and oxygen/gas fading. 
The last will be reduced by framing though. So framing behind glass and 
OBA content can be used if one is aware of all the aspects.

-- 
Met vriendelijke groet, Ernst Dinkla

http://www.pigment-print.com/spectralplots/spectrumviz_1.htm
December 2012: 500+ inkjet media paper white spectral plots.