AOS, LAS,
K12, AES and other anionic surfactant have good foaming ?ability; by
comparison, foam abilities of AOS14-16& AES are the best. Under ?the
condition of hard water and soft water, AOS14-16, AOS14-18
and AES foaming ?force changed little. Due to LAS and K12 hard water
resistant ability is ?poorer, foaming force decreased significantly in
hard water. In the presence of ?sebum, AOS foaming ability is slightly
higher than AES and AS.