Classification
- A minor defect.
Identification
A hot fold is a permanent bend in a seal, formed after sealing and before the area has cooled. This may appear as a large wrinkle or a fold that has been sealed over.
Causes
- At the sealing machine, the plastic was folded while the pouch material was still soft.
- In the retort, the edges of the pouch were folded during the cook process.