Re: Yellow tents and UV (was: outdoor gum demo)

[Paul Viapiano <viapiano@pacbell.net>]

Centennial POP (Chicago Albumen Works) was (sniff!) sensitive to blue and UV 
only...(from their website).

http://www.albumenworks.com/directions.html


Paul




----- Original Message ----- 
From: "Katharine Thayer" <kthayer@pacifier.com>
To: <alt-photo-process-l@usask.ca>
Sent: Wednesday, April 22, 2009 11:57 AM
Subject: Re: Yellow tents and UV (was: outdoor gum demo)


> On Apr 22, 2009, at 11:29 AM, Paul Viapiano wrote:
>
> > Now, of course, if there is cloud cover then all bets are off...
> >
> > I say this partly in jest because in my Darkroom 1 book (Lustrum  Press), 
> > Linda Connor (whose exhibit I've just seen at the CCP in  Tucson) said 
> > that sometimes she'd leave a POP print out on her back  porch for 3 or 4 
> > days!
> But that's a gelatin-silver chloride process exposed with visible  light, 
> no?  Apples and oranges, sorry.   Of course if there's not  much visible 
> light, it's going to take some time to make a print that  depends on 
> visible light.  But the amount of visible light isn't a  measure of UVA. 
> I've exposed gum prints in the shade in 3 minutes,  and no, they weren't 
> underexposed.
>
> kt