Stop Baths

Either citric or acetic acid based, those are the chemicals with the most bothersome smell (think vinegar) but they stop the developing in its track and enable the fix to work better and longer. They will all have an exclamation mark warning as they can irritate the skin or eyes and be unpleasant to breathe. Their toxicity is however very low.

You can use clear spirit vinegar diluted 1:1 as an alternative.

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