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The sodium carbonate is the detergent and that’s probably what I can feel saponifying (sp?) my skin
Good spot, it forms hydroxide ions in solution which will indeed saponify your skin oils and any residual milk fat in the flask. I rather imagined that the offending flask had already been washed out with a detergent đŸ™‚
gbj_tester
I think it’s only the sodium sulphate which is a filler. The sodium carbonate is the detergent and that’s probably what I can feel saponifying (sp?) my skin when I get it on my fingers.