Film Cracking

Tablet Core

  • Core and coating have different thermal expansion properties Reduce mineral type fillers in the core formulation, eg. calcium carbonate, calcium sulfate, magnesium carbonate
  • Lack of relaxation time between tablet compression and coating Extend time between tableting and coating

Coating Formulation

  • Poorly plasticized film coating Select an optimally plasticized film coating from Colorcon


  • Expansion of core due to heating Avoid high tablet bed temperatures