Quote Originally Posted by dyetransfer View Post
...they coated glass plates, and exposed them without drying. They would expose and develop, and look for fogging or a change in the color of a step wedge image. They didn't fix the plates, just examined it in room light for a few seconds.
Hi Jim,

You watched then do this?
How long diid it take between coating and judgment?
After this sort of test, what were their possible moves?

Ray