| abstract |
Provided is a solid soap that has good foaming properties against hard water and has characteristics that are gentle to the skin without blending special medicinal ingredients. SOLUTION: When producing oils and fats and caustic soda as main raw materials, sodium-chloride / bicarbonate spring water, especially chlorine ions (Cl − ) and bicarbonate ions (HCO 3 − ) as anions. By producing soap using hot spring water each containing 30 millibar% or more, a solid soap that has good foaming against hard water, is gentle to the skin, and can be expected to have a beauty effect is produced. [Selection figure] None |