Microencapsulation of various substances encompasses a vast field of exceptional application in modern medicine, pharmacy, perfumery and cosmetics, biomedical engineering, as well as in the textile, petroleum and general industries. Although this process can be effected in different ways, depending on its nature (physical, chemical or physicochemical process), physicochemical group of procedures and in particular coacervation is one of the most preferred in terms of ecological purity and biodegradability of the materials used in this method of producing microcapsules. The material in coacervation process used to produce the microcapsules is entirely from natural sources, which would allow their biodegradability over time. The coacervation can be divided into two types: simple and complex. In the microencapsulation of expensive natural products, they need to be diluted with a suitable solvent for three reasons: on the one hand -due to the cost of the encapsulated substance, on the second -to stabilize the core material, and on the third hand -to increase the efficiency of the process, resulting in higher yield and quality of the microcapsules obtained.This article examines the effect of the type of solvent (playing the role of media for diluting the encapsulated substance) on the encapsulation efficiency, yield, and quality of the microcapsules obtained, in the microencapsulation of rose oil using the complex coacervation process.