FP - Seal Defects (Convolution/Embossing)

Classification 

  • A minor defect.

Identification 

A slight visual impression in the seal indented on one side and raised on the other side.

Causes 

  1. The seal area of laminate package containing metal layers was contaminated with product, moisture, grease, or other contaminants.
  2. There are minor irregularities in sealing bar or anvil surfaces.