The term "colloid" introduced the English scientist Thomas Graham, who began a systematic study of colloid systems and, in particular, solutions of adhesives in 1861. Subsequently, it was found that colloid systems differ in properties from homogeneous solutions may be obtained not only from the adhesive, that is why, the range of objects and phenomena studied this science greatly expanded, but the name is traditionally been preserved. Colloid chemistry is a science of surface phenomena and disperse systems. Examples of surface phenomena are adhesion, wetting, adsorption, etc .; dispersions - sols, suspensions, foams, and others. Objects of colloid chemistry are characterized by two features - heterogeneity and dispersion. Heterogeneity means having interphase surface, that is, colloid chemistry objects are multiphase. This feature is considered as the primary and qualitative. Dispersion is a secondary quantitative feature, means that the one of the phases of the heterogeneous system is in dispersed (fragmented) form.Formally, in homogeneous solutions are also dissolved substances in the dispersed state (up to molecules and ions), but such systems do not have the first feature – heterogeneity, that is why this solutions are not objects of colloid chemistry. Thus, the objects studied by colloid chemistry, composed of at least two phases, one of which is solid, is called a dispersion medium, and the second, dispersed, - the dispersed phase. In general, these objects are called disperse systems.