Characterization of foam (Stability and Bubble size)

In addition to its medical and hygienic effects, toothpaste should also ensure a pleasant sensation in the mouth during cleaning. Foam formation plays a key role for both purposes: it is important for the distribution and cleansing effect of the toothpaste and is generally perceived as pleasant – provided not too much foam is formed. So optimizing the foamability and consistency of the foam formed is an important step in the development of toothpaste recipes. Whereby the number of expensive and time-consuming test group studies can be reduced if foam formation is tested in advance using suitable measuring methods. Equally important for quality assurance during production are meaningful analyses.

Introduction One of the characteristic of a surfactant is its ability or not to generate foam. Surfactant are used in different application and some require foam (shampoo, detergent, etc) and other doesn’t (pulps, paper industry, etc). The determination of the stability of the foam is important in order to get the right use property depending on the application. The Turbiscan™ enables to measure the drainage of the foam and the coalescence of the air bubbles. In this note, the kinetics of destabilization was measured for different foam