Core-shell particles are structured composite particles consisting of two different materials, one forms the core other forms the shell. Enhanced properties are often achieved in these specially designed particles which cannot be met by blending of two materials. The synthesis of such multiphase particles often provide the opportunity to tailor properties for a range of desired applications such as paints, coatings, cosmetics, drug-delivery, paper industries etc. Core-shell particles may be of many types: inorganic-inorganic, organic-organic (polymer-polymer), hybrid organic-inorganic etc. The present book deals with the development of different types of core-shell particles by emulsion and mini-emulsion polymerization technique and their potential applications in the field of paint, electronics etc.