Spray drying is the most commonly used micro-encapsulation method in the food industry, is economical and flexible, and produces a good quality product (Dziezak, 1988). The process involves the dispersion of the core material into a polymer solution, forming an emulsion or dispersion, followed by homogenisation of the liquid, then atomisation of the mixture into the drying chamber (Jackson and Lee, 1991). This leads to evaporation of the solvent (water) and hence the formation of matrix type micro capsules.