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...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.