U of S | Mailing List Archive | alt-photo-process-l | RE: continued solarplate notes

RE: continued solarplate notes

Hi Christina,

It depends on time (UV level peaks between 11:00AM and 01:00PM), season
/ weather and how north and south you're located...

Currently the UV index here in Istanbul is around 4.5 at max. -> it can
go up to 11 in mid-summer (see http://www.enka.com/weather/ - this
particular station is located 200 yards away of my house). I guess UV
index doesn't go above 3-4 right now in Montana; this is pretty weak. A
definite test can be made by using a light integrator.


-----Original Message-----
From: Christina Z. Anderson [mailto:zphoto@montana.net] 
Sent: Monday, April 09, 2007 5:44 AM
To: alt-photo-process-l@usask.ca
Subject: Re: continued solarplate notes


Considering that Mike Ware says the sun is several times more powerful
UVBL (anyone know the exact comparison?) this is enough proof to me that

there is a quite wide range of acceptable exposure and that the ratio is

where it's at.