A controlled release delivery device for controlled release of an active ingredient comprising: (i) a core particle comprising the active ingredient homogenously dispersed or dissolved therein； and (ii) an organosol polymeric coat comprising a homogenous mixture of, (a) a water soluble gel forming polymer and a water insoluble organosoluble polymer in a dry weight ratio of from about 20:80 to about 50:50, (b) an organosolvent, and (c) an anti-tacking agent； the organosol polymeric coat being applied directly to and substantially enveloping the core particle.
