RPC - Swell (Swollen Package)


  • A critical defect.


The package bulges due to gas formation from bacterial contamination, or excess internal residual air.


  1. The food was underprocessed or contaminated during aseptic processing.
  2. The package material was not properly sterilized or was contaminated during aseptic processing.
  3. The package was overfilled or a proper vacuum was not drawn, which resulted in an improper thermal process.
  4. The food package was under-processed during thermal processing.
  5. There was insufficient chlorine in the cooling water.
  6. The package leaked after processing.
  7. The post-process handling was too rough.