Question for UK members:Johnson 142

Discussion in 'Enlarging' started by Smudger, Jan 23, 2008.

  1. Smudger

    Smudger Member

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    I have inherited a 4oz bottle of this stuff - described on the label as "Preventing fog and stains".
    I assume it is Benzotriazole. Can anyone suggest a suitable dilution for use with elderly,fogged paper? And,given it is probably 30 years old,and has a slight fine precipitate in the bottle,is it likely to be usable?