COLLOID STABILITY AND POPULATION-DENSITY STUDIED BY MEANS OF A MICROHOLOGRAPHIC TECHNIQUE

Microholography is a sensitive technique for the detection and visuali zation of the separation phenomena appearing in an emulsion. For diffe rent but close compositions, emulsions can display various physical be havior such as decantation or demixtion that can be evidenced by this technique. We give here the static response, which is the description of a heterogeneous medium containing a size-dispersed component. It is shown that the microholographic technique, which gives a 3-D represen tation of a particle system, is much more powerful than the techniques usually used. (C) 1997 Academic Press