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About alums....Question for the experts

Question asked by laura fridley on Jan 1, 2014

I've just started researching alums for use in soapmaking and I have a specific question regarding potassium alum.  My question has to do with the stability of this alum in an NaOh solution.  What I would like to know is this, will the potassium ions remain in association with the aluminum silicate, or will these be displaced by Na in a strong NaOh solution during the soapmaking process?  I am asking because potash lyes make soft soaps, so I'm wondering if using potash alum would create too soft a bar.  Thanks for answering, much obliged!