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  #1  
Old 3rd February 2022, 01:07 PM
Nat Polton Nat Polton is offline
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Default Kodak F24 Fixer

Does anyone know the shelf life of home made Kodak F24 Fixer?
Also what area of paper a litre would fix?

Thank you in advance.

Cheers.
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Old 3rd February 2022, 05:52 PM
Mike O'Pray Mike O'Pray is offline
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What's the ingredients of this stuff Nat? I tried to Google it but all I got was F24 fixer which is seems to be the trad sodium thiosulphate fixer with citric acid.

Thanks

Mike
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Old 3rd February 2022, 06:54 PM
Lostlabours Lostlabours is offline
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F-24 has a shelf life of around 3 months according to Kodak, it doesn't contain Citric acid and the formula is correct in the Darkroom Cookbook. 3rd & 4th editions. However Steve Anchell does suggest you can add Citric Acid instead of the Metabisulphite.

In practice it will probably last over a year.

Ian
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Old 3rd February 2022, 07:17 PM
Nat Polton Nat Polton is offline
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That's the stuff Mike.
Greg Davis has this on his youtube channel.
https://www.youtube.com/watch?v=vRiZDbbcoDo
3 mins. 30 sec. into the video he gives the name and ingredients.

Kodak F24 Fixer,
sodium thiosulphate 240g
sodium sulphite 10g
either
citric acid 22g or sodium bisulphite 25g



What I am looking for is a cheap, long shelf life, paper developer.

Cheers.

the latter is a bit smelly apparently.
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Old 3rd February 2022, 07:25 PM
Nat Polton Nat Polton is offline
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Smile

Ian you have just thrown a spanner in the works.
A bit different from the ingredients given by Greg Davis in his video.
I can view The Darkroom Cook Book on the web so I will go with their information.
I forgot all about the book.

Cheers Mike and Ian.
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Old 4th February 2022, 12:14 AM
Lostlabours Lostlabours is offline
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It won't keep as well with Citric acid, with Metabisulphite it's not that bad, it's a standard fixer. Moulds and bacteria can grow in dilute Citric acid, Metabisulphite has strong anti-bacterial and anti-mould properties even in a weak solution.

Ian
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