Old DD-X == fully developed, but very grainy negs
Last year I bought a bottle of Ilford DD-X at a local camera shop. I have a feeling it sat on the shelf for awhile.
I remember the results were pretty good when I first used it. But 9 months passed before I used it again in the past couple weeks. The bottle is about 2/3s full.
Both rolls of film I developed have the right contrast, but the grain is HUGE.
I also read a post on rec.photo.darkroom where somebody else also noticed that old DD-X results in big grain (but normal contrast).
Does this make any sense?
1. Much of the sulfite is oxidized.
2. The pH of the developer is increased due to sulfonation of hydroquinone.
2 is easy to verify with a decent pH meter. 1 requires a bit of analytical lab work to determine how much of the sulfite is oxidized.