Percolation theory is a statistical theory applied to explain behaviour of disordered systems. It considers a system to be composed of an infinite lattice. Random site, random bond and site-bond percolation types are commonly observed. The article explains the concept of percolation theory and types. Leuenberger started the application of this concept in the field of pharmacy. Its applications in powder technology, sustained release matrix systems and emulsions are discussed. The percolation theory will be an important tool in the design of dosage forms.
By G. Bhat, A. Hosmani, A. Ketkar & A. Paradkar