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  1. #1

    Join Date
    Oct 2005
    Location
    Madison, WI
    Shooter
    4x5 Format
    Posts
    101

    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?

  2. #2

    Join Date
    Jan 2005
    Location
    Boston, MA
    Shooter
    Multi Format
    Posts
    1,416
    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.



 

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