What is Blister on the Upper Finish Glass Defect?

What is Blister on the Upper Finish Glass Defect?

By: Berlin Packaging Specialist
Date: November 11, 2019

Blister on the Upper Finish is a type of glass defect during the manufacturing process of glass bottles.

Broken or unbroken bubbles in the thickness of the glass on the finish.

Problem

  • Risk of glass particles inside.
  • Risk of breakage during the heat treatment and sealing.
  • Defective closure, risk of leaks, product deterioration.