oskar_romeo Posted September 24, 2018 Share Posted September 24, 2018 Since the only available way to get Phenidone near me (without import issues) is buying 1 litter bottles it seems to be way too much developer so I need to know a few things: Will it last a some years before expiring? How should I store it once and everytime I get a portion out of it in order not to get it damaged by oxygen or other agents? Should I place marbles inside the bottle to top it not allowing air inside? All comments are wellcome!! tcdp Link to comment Share on other sites More sharing options...
ben_hutcherson Posted September 24, 2018 Share Posted September 24, 2018 What sort of "phenidone" are you buying? The pure chemical is a white crystalline solid with a melting point of 121ºC-so not something that you'll likely encounter as a liquid unless you intentionally make it that way. If it's a solid, keep it cool and minimize its exposure to air-it should keep a while. I wouldn't want to buy it as a solution, but if you do again minimize its exposure to air. I'd be concerned about its shelf life. Link to comment Share on other sites More sharing options...
oskar_romeo Posted September 25, 2018 Author Share Posted September 25, 2018 What sort of "phenidone" are you buying?/QUOTE] Link to comment Share on other sites More sharing options...
oskar_romeo Posted September 25, 2018 Author Share Posted September 25, 2018 Thanks for the answer. I think this store is selling 'POTA developer' which is Pehenidone base developer, so it's really not phenidone!! I was also suspicious Thank you!! Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted September 25, 2018 Share Posted September 25, 2018 Most likely it's Phenidone-3. It'll last decades without any particular care. It turns slightly pink with oxidation, but if used in a superadditive combination with hydroquinone or sodium ascorbate, that slight oxidation makes no difference to the developing action. A Kg of phenidone will most likely outlive its owner! Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted September 25, 2018 Share Posted September 25, 2018 P.S. POTA contains 1.5 gm/litre of phenidone, and while I doubt that POTA itself is of much use as a general purpose developer, it could be turned into 3 litres of a phenidone-ascorbate substitute for D-76. I have a suitable formula somewhere, if you're interested. Link to comment Share on other sites More sharing options...
Bill Bowes Posted September 28, 2018 Share Posted September 28, 2018 Some time ago when working with Minox negatives, there was a bit about phenidone in an alcohol solution. The required amount was drawn out as needed. You might research this approach to your needs. Bill Link to comment Share on other sites More sharing options...
oskar_romeo Posted October 5, 2018 Author Share Posted October 5, 2018 P.S. POTA contains 1.5 gm/litre of phenidone, and while I doubt that POTA itself is of much use as a general purpose developer, it could be turned into 3 litres of a phenidone-ascorbate substitute for D-76. I have a suitable formula somewhere, if you're interested. Thank you, but it's a bit difficult obtaining Phenidone in my country. Thanks anyway Link to comment Share on other sites More sharing options...
mikheilrokva Posted October 8, 2018 Share Posted October 8, 2018 Thank you, but it's a bit difficult obtaining Phenidone in my country. Thanks anyway Are you from Georgia, by any chance? :rolleyes: Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted October 8, 2018 Share Posted October 8, 2018 Thank you, but it's a bit difficult obtaining Phenidone in my country. Thanks anyway - If you can get POTA, then you can get Phenidone. Just in solution. As I said, one litre of POTA contains 1.5gm of Phenidone, which is sufficient for 3 litres of a PQ or Phenidone-Ascorbate substitute for D-76. The only other chemical in POTA, is sodium sulphite, which is used in almost every other developer formula ever invented. Link to comment Share on other sites More sharing options...
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