The method may also further comprise a step of concentrating the hybrid/composite capsules to obtain a desirable concentration of the hybrid/composite capsules, optionally in the form of a colloidal dispersion in water. In various embodiments, the concentrated hybrid/composite capsules remain substantially intact i.e. no leakages or breakages. The method may further comprise a step of drying the hybrid/composite capsules, optionally by freeze drying or spray drying the hybrid/composite capsules with appropriate protecting agents or additives, to produce solid forms of the hybrid/composite capsules. In various embodiments, the dried hybrid/composite capsules remain substantially intact i.e. no leakages or breakages. The method may further comprise a step of loading one or more of the following into the hybrid/composite capsules: oil, silicone oil, active including sensitive active (e.g. sensitive to free radical reactions), aroma, aroma oil, flavour, fragrance, perfume, drug, therapeutic, cosmetic, skin care substance, consumer care substance or combinations or mixtures or derivatives thereof. In various embodiments, the steps following the step of adding the at least one primary capsule to the polymer latex particles and preceding the purifying step are conducted as a one-pot synthesis/one-step direct synthesis process to produce the hybrid/composite capsule. In various embodiments, the method has high encapsulation efficiency, high scalability and/or high reproducibility. For example, embodiments of the method may have a high encapsulation efficiency in the sense that (i) no less than about 40%, no less than about 35%, no less than about 30% or about 20- 30% by weight of actives in the water/aqueous medium can be emulsified and encapsulated in the primary capsule and/or the hybrid/composite capsule with almost quantitative efficiency by use of embodiments of the method and/or (ii) leakage of the actives from the primary capsule and/or the hybrid/composite