Old DD-X == fully developed, but very grainy negs

Discussion in 'B&W: Film, Paper, Chemistry' started by MikeM1977, Mar 26, 2006.

  1. MikeM1977

    MikeM1977 Member

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    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?
     
  2. Ryuji

    Ryuji Member

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    Possibilites:

    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.