Characteristic Curve Data

I've slightly reformulated the emulsion to remove some lingering base fog and also make the highlights a bit punchier.  So batch 42 was a test batch to do this stuff.   I characterized this batch to baseline the emulsion recipe going forward. 
Base fog: 0.09
Gamma 1.05.
Development was per box recommendations, except developer temperature was 22C.  I would expect contrast to be slightly lower at 20C.

I really like how plates from this batch look, as demonstrated by Portrait Test Victim #3 taken with a 150mm f/4.5 Voigtlander Heliar onto 4x5.  Metering was at ASA 2 on a gray card next to his face.