The simplest of paints consist of pigment and binder, plus perhaps a little solvent. Pigment is what gives color to paint; in its raw form, it is a fine powder. Binder is what holds the pigment and enables paint adhesion on a surface. The pigment particles are insoluble and merely form a suspension in the binder. There are a great many pigments as well as a great number of binders for pigments. It is the binder resins that give us the many different types of paint, such as oil, acrylic and epoxy. Each chemical resin binder imparts a unique quality and cures in an individual manner, either by one of many types of chemical reaction, or simply by evaporation of the solvent.