multiple micro - encapsulations of a high concentration oleophilic substance using heat to set the primary particle renders the composition suitable for the production of free - flowing powders or beadlets . microencapsulation involves forming an emulsion out of the oleophilic substance and a polymer , and then use heat setting and / or cross - linking the polymer encapsulates the oleophilic composition . this process is then repeated with a second polymer or third polymer , and with or without cross - linked via the same or different mechanism to further protect the oleophilic substance .