Pharmaceutical Coating Technology (Part 7)

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Pharmaceutical Coating Technology (Part 7)

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The coating process Graham C.Cole SUMMARY In recent years tablet coating has undergone several fundamental changes. The original sugar-coating technique has been largely replaced by film-coating processes using organic solvents. The organic solvents are now being replaced by water because of the development of suitable polymers, improvements in the coating process, and legislation regulating the discharge of pollutants into the environment. This change has resulted in increased interest in equipment designed for film-coating based on cylindrical-shaped side-vented pans which allow the drying air to be drawn through the tablet bed. However, the process is complex and requires careful monitoring and...

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