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hidden superfat

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    NaOH and hidden superfat

    I recently read that Soapcalc assumes the NaOH that one uses is 100% pure. I’m using 98% pure NaOH, so am I correct in assuming that I’m actually adding an additional 2% superfat just by using this 98% pure NaOH? If this is true then new soapers should really be aware of this.
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