[dwross]

So, what ISO would home made dry plates be? I've heard they are about ISO 1.0, or ISO 0.5?
Kent in SD

Oh, heavens, no. At the 45th parallel, this recipe

http://www.thelightfarm.com/cgi-bin/...tent=30Dec2011

gets 6 to 40, depending on time of year and time of day, and to a lesser extent, altitude. (It is impossible to place a single ISO number on anything but panchromatic films. If you read otherwise, this is a red flag to suspect the experience of the source.)

d