Melamine-formaldehyde microcapsules were prepared by conventional interfacial addition polymerization and characterized by Fourier transform(FTIR) spectroscopy, particle size analyzer, and scanning electron microscopy. The effects of polymerization variables such as the nature and concentration of surfactants, agitation speed, and agitation time on the particle size and particle size distribution were investigated. FTIR spectroscopic data shoed that perfume oil was successfully encapsulated in the microcapsule. The nature of surfactants had profound effects on the particle size and particle size distribution. It was also found that the use of poly(vinyl alcohol) was critically important to prevent agglomeration of microcapsule particles.