A method of producing encapsulated droplets, comprising the steps of: (a) providing a microencapsulation apparatus including a first channel having a first channel exit opening, , a second channel having a second channel exit opening positioned concentrically around the first channel exit opening and a pressure chamber at least partially surrounding the first and the second channel exit openings, wherein the pressure chamber includes a pressure chamber exit orifice downstream of both the first and second channel exit openings; (b) identifying a first group of control parameters, said parameters comprising: Reynolds number of the first material, - Reynolds number of the second material, - Weber number of the first material, - Weber number of the second material. said parameters being associated with undesirable flow regimes in the region: (i) Re 2 We 1 1/4 < 1.2, or (ii) Re 1 2 Re 2 < 10 and Re 2 We 2 < 3, or (iii) Re 2 We 1 /We 2 < 1; (c) selecting control variables, based at least in part on the identified group of control parameters outside the regions defined in step (b) (d) introducing the first material in the first channel, the second material in the second channel, and a third material in the pressure chamber so the first and second materials form a microjet extending toward the pressure chamber exit orifice; and (e) forming a plurality of encapsulated droplets of the first material surrounded by the second material when the third material is emitted from the pressure chamber exit orifice. (a) providing a microencapsulation apparatus including a first channel having a first channel exit opening, , a second channel having a second channel exit opening positioned concentrically around the first channel exit opening and a pressure chamber at least partially surrounding the first and the second channel exit openings, wherein the pressure chamber includes a pressure chamber exit orifice downstream of both the first and second channel exit openings; (b) identifying a first group of control parameters, said parameters comprising: Reynolds number of the first material, - Reynolds number of the second material, - Weber number of the first material, - Weber number of the second material. said parameters being associated with undesirable flow regimes in the region: (i) Re 2 We 1 1/4 < 1.2, or (ii) Re 1 2 Re 2 < 10 and Re 2 We 2 < 3, or (iii) Re 2 We 1 /We 2 < 1; Reynolds number of the first material, - Reynolds number of the second material, - Weber number of the first material, - Weber number of the second material. said parameters being associated with undesirable flow regimes in the region: (i) Re 2 We 1 1/4 < 1.2, or (ii) Re 1 2 Re 2 < 10 and Re 2 We 2 < 3, or (iii) Re 2 We 1 /We 2 < 1; - Reynolds number of the second material, - Weber number of the first material, - Weber number of the second material. (i) Re 2 We 1 1/4 < 1.2, or (ii) Re 1 2 Re 2 < 10 and Re 2 We 2 < 3, or (iii) Re 2 We 1 /We 2 < 1; (c) selecting control variables, based at least in part on the identified group of control parameters outside the regions defined in step (b) (d) introducing the first material in the first channel, the second material in the second channel, and a third material in the pressure chamber so the first and second materials form a microjet extending toward the pressure chamber exit orifice; and (e) forming a plurality of encapsulated droplets of the first material surrounded by the second material when the third material is emitted from the pressure chamber exit orifice. <EOS>