Various mineral salts are dissolved in this water. It is not easy to get a foam of soap if calcium or magnesium chloride, sulfate, carbonate or bicarbonate, etc. salts are dissolved in the water. This kind of water is called hard water.
Various mineral salts are dissolved in this water. It is not easy to get a foam of soap if calcium or magnesium chloride, sulfate, carbonate or bicarbonate, etc. salts are dissolved in the water. This kind of water is called hard water.
