Thanks for your response. Can anything be added to counteract the lack of longevity?No, it doesn’t mean it will go off sooner. It means how long the bar will last in normal use, and and is based on the solubility of the soap.
The number comes from Subtracting the cleansing value from the hardness Value.
Some soaps, like pure castile (100% olive oil soaps) will be hard enough to pound nails with after a long cure- but will not last as long in the shower due to its higher solubility.