Liquid and Foam Soap

Student : sir,what is the differences between liquid soap and foam??

Teacher : Both of them are made up by same processes,only the ingredients a litle bit different in quantity.
Yup,the foam soap needs foam booster to make it produces more foam.Commonly the compound was added as the foam booster is cocoaminido propyl betaine.

Student : where is the water?? The water disappear in foam soap if we compared with liquid soap.

Teacher : soap has two poles,oil likely and water likely...
Because of oil likely pole,soap is able to trap the oil or organic compound on our skin.
And by the water likely pole,the result of saponification is solved to the water as the medium.
If we add the foam booster,so the water is bonded in the different form,but still acts as the medium of the soap.

Liquid and foam soap are made up by these main materials :
1.Texapon
    Texapon or Sodium Lauryl Sulphate (SLS) is a surfactant,gel form.

2. Sodium sulphate
    Powder form,as an emulsifier and to speed up the lifting process of the waste on our skin.

Student : ok sir thank you very much.
Teacher : you are welcome