By: Berlin Packaging Specialist
Date: November 11, 2019
Blisters on the External Surface is a type of glass defect during the manufacturing process of glass bottles.
Usually elongated, they may be:
Cracked (C) > the outer surface is broken
Not Cracked > but with a thin skin, the severity level is:
> 4 mm (M+) = 4 mm (M-) < 4 mm (m)
- Cracked problem: potentially hazardous for the operator.
- Not Cracked: ≥ 4 mm > risk of breakage during bottling and handling. Dangerous with carbonated beverages. < 4 mm > not very dangerous, considered mainly an aesthetic defect.