Many everyday materials, such as paint formulations and foodstuffs, are macromolecular mixtures. These macromolecules macromolecules often show no willingness to join together in one mixture, thereby forming two separate phases. Examples include pigment and binding particles in paint or polysaccharides and proteins in foodstuffs. Usually this phase separation is unwanted, but Vis will use new, experimental techniques to understand this interface and try to be able to stabilize it. If he succeeds, it will pave the way for new materials, like fat-free mayonaise or new types of paint.