Quote Originally Posted by Two23 View Post
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


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.)