I don't know what's there to keep a stop bath alive other than the acid that is the essence of the whole thing. That's typically acetic or citric acid. I suppose the phenoxyethanol is there to prevent biological growth (bacteria, general sliminess) which esp. citric acid stop bath can suffer from. The solution is simple - ignore commercial stop bath and instead just keep a jar of citric acid crystals or a jug of acetic acid (choose whatever concentration you're comfortable with) and mix fresh stop bath whenever you need it. Discard after use.the simplicity stop bath, for instance, doesn't have phenoxyethanol which helps maintaining the product "alive".
Fixer is fixer, there's not a whole lot that can go wrong with it. Ilford Simplicity fixer is just rapid fixer. The only 'drawback' of this particular product is that it apparently comes in sachets of 600ml. Yes, I see Ilford claims it's good for 2x135 or 1x120, but the same applies as to any fixer: if you fix for twice the clearing time, you can safely assume it's still OK especially if that clearing time isn't outrageous. And also, the fixer is OK as long as it's clear and doesn't throw down a precipitate.Same with the fixer one, so far, only good for 2 rolls...
Some thoughts related to this?
I don't know what's there to keep a stop bath alive other than the acid that is the essence of the whole thing. That's typically acetic or citric acid. I suppose the phenoxyethanol is there to prevent biological growth (bacteria, general sliminess) which esp. citric acid stop bath can suffer from. The solution is simple - ignore commercial stop bath and instead just keep a jar of citric acid crystals or a jug of acetic acid (choose whatever concentration you're comfortable with) and mix fresh stop bath whenever you need it. Discard after use.
but the same applies as to any fixer: if you fix for twice the clearing time, you can safely assume it's still OK especially if that clearing time isn't outrageous. And also, the fixer is OK as long as it's clear and doesn't throw down a precipitate.
and stop is just acid.
It's advertised as being good for one roll of 120 or two rolls of 35mm. I'm seeing it at $32. For that price, you could buy enough developer, fixer, and wetting agent to do 100 rolls of film... so yes, probably for people who do one or two rolls per year and don't want to keep solutions around. Maybe something to buy when you are away from home in a hotel.
It should be great for storing in case you run out of your usual photo chemicals and need something until you can get more.
Stop bath doesn't go off due to oxidation. The pH drifts upwards due to carryover of developer and that ultimately renders it ineffective as soon as the pH approaches the point where the developing agents become active again (probably 8-ish). The color shift in some commercial stop bath is an indicator dye that changes color with pH. I don't know if the Simplicity stop bath has this dye. Either way, as I said before, I wouldn't worry about it. Just just a little acid in water. I never buy commercial stop bath nor do I see the point in doing so.in the case of bath stop, I am wondering if the simplicity turns blue with oxydation, so that would be an indicator...
I'm sure Ilford's recommendation is based on selling more chemicals and avoiding any potential complaints than actual reality.
Stop bath doesn't go off due to oxidation. The pH drifts upwards due to carryover of developer and that ultimately renders it ineffective as soon as the pH approaches the point where the developing agents become active again (probably 8-ish). The color shift in some commercial stop bath is an indicator dye that changes color with pH. I don't know if the Simplicity stop bath has this dye. Either way, as I said before, I wouldn't worry about it. Just just a little acid in water. I never buy commercial stop bath nor do I see the point in doing so.
It's just Ilford rapid fixer. It's specified on the Simplicity product page. Clearing time will be in the same ballpark as other rapid fixer from the same manufacturer.I can't quite remember, but if I’m not mistaken, the fixer also had a slightly longer clearing time.
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