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    Athiril's Avatar
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    Quote Originally Posted by john_s View Post
    I notice on the web site

    http://www.lostlabours.co.uk/photogr...rs/devID68.htm

    the formula for ID-68 contains no bromide although the replenisher does. Other sites show some KBr. I have used Pyrocat-HD without bromide (as suggested for some uses by Sandy King who invented it) which is supposed to give marginally more speed at the expense of a little fog. Is the bromide essential for the ID-68?
    Other way around like I thought it would be.

    The recipe linked has Potassium Bromide in the working developer, and none in the replenisher.

    This is because bromide salt concentration will increase as you develop film with the developer. The replenisher containing none, will dilute this level back down again to a more normal level. Maintaining (or attmepting to maintain) the same bromide concentration level.


    Here is another copy of the ID-68 formula
    http://books.google.com.au/books?id=...ormula&f=false

    And
    http://www.digitaltruth.com/data/ilford_id68.php


    I would suggest this version is correct, and a bromide-free version modified.
    Last edited by Athiril; 05-07-2012 at 09:25 PM. Click to view previous post history.

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