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Dr. Md Rushad Rahman
এমবিবিএস(আরপিএমসি)
,
পিজিটি(মেডিসিন)
Adding fats, or "hard oils" (such as lard, coconut oil, palm oil, etc.) to a soap is necessary to give the soap the required "hardness" and long-lasting properties. Soap created without any fats tends to be too easily dissolved while you use them, and, additionally, have a tendency to turn soft and "mushy" when exposed to water for extended periods of time.
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