How to test the hardness and lathering of soaps?
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To test the hardness of soaps, a hardness tester with an indentation former and image capture controller can be utilized to calculate the soap's hardness based on extracted indentation areas . The resistance of soap to water hardness, reflecting its lathering ability in hard water, can be assessed by considering factors like fat base composition, soap solubility, polymorphism of soap crystals, and additives in the soap . Differential scanning calorimetry (DSC) studies can help identify key polymorphic states of soap, correlating them with consumer-perceived lathering attributes and solubility properties of the soap bars . By combining these methods, one can comprehensively evaluate the quality, effectiveness, and user experience aspects of soaps through hardness and lathering tests.
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1 Citations | The resistance of soap to hardness of water can be tested by assessing its lathering ability in hard water, reflecting soap quality based on fat base, solubility, crystal polymorphism, and additives. |
3 Citations | The hardness and lathering of soaps can be tested by differential scanning calorimetry (DSC) to correlate thermal absorptions with soap phases and consumer-perceived attributes. |
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