Аннотация:We revealed experimentally the formation and growth of colloidal particles in an additive solution in an oily base under the action of a short-term microwave radiation without solution heating. This is analogous to the well-known phenomenon of formation and growth of colloidal particles under long-term heating. Similarity of the formation and growth of colloidal particles of an additive in such a solution and the liquid drop growth in an overcooled vapor is demonstrated.