That's going to make you maybe a few liters of fixer concentrate at roughly the same cost as just buying the fixer ready-made.I'm able to get Ammonium Thiosulfate (1kg for roughly 10 USD).
That's going to make you maybe a few liters of fixer concentrate at roughly the same cost as just buying the fixer ready-made.
Technically there's nothing wrong with giving DIY fixers a try of course, and ammonium thiosulfate actually keeps much better than some people apparently want you to believe (I suspect they don't have first hand experience with it), but economically it doesn't make any sense. Fixer is cheap.
@indian Sodium sulfite AR, as in reagent grade? It's quite an overkill. I use technical grade sodium sulfite for all my chemicals and never had any problems. Nothing wrong with AR grade per se, but it can get very expensive.
Oh, I see. AR stuff around here is usually far more expensive...I've option to buy Sodium Sulphite in three varieties (Anhydrous, For Molecular Biology & Normal) the price difference between the three is around 50 cents. AR falls in the middle.
Don't forget to include food grade suppliers in your search. It's usually the cheapest solution.I've option to buy Sodium Sulphite in three varieties (
The swimming pool department at Walmart has S. Thiosulfate, S. Sulfite and S. Carbonate at probably the lowest prices. I don't know how that translates to India.
I'll be damned, in India it seems reagent grade S. Sulfite anhyd. is $4/lb (INR 334 / 500 gm). In the US you can buy 2.5 kg of J.T. Baker guaranteed assay AR/ACS S. Sulfite for $600. Amazon sells claimed AR grade of no particular provenance for ~$15-30 / lb.
D-72 is perfect. For the fixer, if you can get sodium bisulfite/metabisulfite I suggest Ryuji Suzuki’s neutral rapid fixer in place of TF-3 which is alkaline and will be more smelly than a neutral fixer. Working solution:
Ammonium Thiosulfate 60% 200ml
Sodium Sulfite 15g
Sodium Metabisulfite 5g
Water to make 1 liter
Also how much Ammonium Thiosulfate should I dissolve in water for 800ml?Yes I could certainly do with less odor. Would I need a citric acid stop or would plain water do?
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