ufactured to facilitate the necessary 'push-through' characteristic. A recent development is the all-aluminium blister pack. The cold-formed trays are filled with the medicine in aqueous form and freeze dried into individual tablets, which adopt the shape of the individual alufoil compartment. Blister packing are also used for diagnostic products, ointments, and light sensitive formulations where total barrier performance is required. As product counterfeiting has become an increasingly serious