Re: Yellow tents and UV (was: outdoor gum demo)
I observe this with pure palladium printing...7 minutes is my time.
Now, it's purely anecdotal and not scientific because I don't measure reflective densities of wedges with a densitometer.
----- Original Message ----- From: "Loris Medici" <firstname.lastname@example.org>
Sent: Tuesday, April 21, 2009 10:22 PM
Subject: Re: Yellow tents and UV (was: outdoor gum demo)
Which process is that and what was the exposure time? I did notice a difference (albeit not linear as I first predicted - have to work on this) with traditional cyanotypes. Maybe it's because at fast printing times it could be harder to notice any difference and/or self masking plays a significant role... ??? Anyway, I'm ready to eat my assertion (and go to the corner on one leg) if someone comes up with an quantitative explanation to why giving the same source (the sun) UVA intensity remains the same whereas other types of irradiation seems to change intensity. Regards, Loris. 22 Nisan 2009, Çarşamba, 5:36 am tarihinde, Paul Viapiano yazmış:Remember when we were talking a little bit re: this on the Hybrid forum? So far, I've noticed no change in exposure times from UV Index 4 through UV index 9 when exposing via the sun... Paul