Quote Originally Posted by Mark_S View Post
Just wild dreaming here but......
Most film is not sensitive to IR, but IR is blocked by silver - therefore it would be possible to build a B&W film processor which would continually scan the negatives as they developed, and develop until you reached a pre-set contrast ratio. Sort of the ultimate snip test.
Extending your idea some, you could wear IR goggles (for night-vision) and with an IR light-source in the darkroom, you could develop by inspection.

Mark Overton