... change is small when pH value is within 2 to 12 but decreasewhen pH value is low than the ... ionic surface-active agent, it possesses the following characteristics inaddition to acts of thicker agent, suspending agent, adhesive agent, emulsificationagent ... adhesive protective gelatin, thicker agent and stabilizingagent as well as additives to make emulsion, frozen gelatin, lotion, eye clear agent, ...