Quote Originally Posted by R Shaffer View Post
Off topic a bit.

Well, I just learned that the hard way. Recently used three tissues I made a few months ago. Had good notes from my initial prints. Used the exact same negatives, sensitizer & exposure times. Now wanting to make the most of my limited time, I exposed & mated all three.

Upon development - No tone/paper white until around what should have been zone 7. OOPS

But I fixed the blister problem
That's a huge change in sensitivity. I always thought that the influence of humidity/moisture was maybe +/- 1 stop. Not the huge change you saw.

At the risk of going further off-topic, it makes me wonder whether something else changed between then and now. Sensitizer measurement error, bulb aging, etc.

--Greg

PS--Rob, if you want to discuss this further, we could probably have the mods split this off into a separate thread.