Coacervation-phase separation consists of three steps carried out under continuous agitation.
Formation of three immiscible chemical phases: liquid manufacturing vehicle phase, core material phase and coating material phase.
Deposition of coating: core material is dispersed in the coating polymer solution. Coating polymer material coated around core. Deposition of liquid polymer coating around core by polymer adsorbed at the interface formed between core material and vehicle phase.
Rigidization of coating: coating material is immiscible in vehicle phase and is made rigid. This is done by thermal, cross-linking, or dissolution techniques.