Q. How can you know the quality of a particular soap?

Answer

The most important characteristics that tell you about the quality of a soap is its Total fatty matter (TFM). Ideally soaps with minimum 75 percent TFM is referred to as Grade 1 and those with minimum 65 percent TFM as Grade 2 and soaps with less than 60 percent of TFM as Grade 3. Having said that, toilet soaps with high TFM quantity can sometimes dry up your skin, if their pH levels are too high.