NAACO Zip Fix

Discussion in 'B&W: Film, Paper, Chemistry' started by Maine-iac, Oct 16, 2004.

  1. Maine-iac

    Maine-iac Member

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    Just picked up some NAACO Zip Fix--the concentrate is relatively cheap, and the ingredients are only Ammonium chloride and Potassium Metabisulfite. No acetic acid. Any reason why a bit of metaborate or carbonate added to it could make a good alkaline fixer?

    Larry

    PS. I've done this successfully with Ilford's Rapid Fix, except that since it contains acid, quite a bit of carbonate is needed to bring it to the alkaline side of the divide. 2 TBS. per liter of film strength. And it also produces a fairly strong ammonia odor.