Glass failure expert witness performs a root cause failure analysis on a failed wine glass. Failure analysis revealed that the failure initiated on the inside edge at the bead on the top. The top left photograph shows the re-assembled glass; the arrow indicates the crack starting point. The […]
Glass Expert Discusses Glass Ovenware
A glass expert in California compares Pyrex glass ware from two eras. The original glass ovenware was developed by Corning Glass Works. They introduced annealed borosilicate glass that had a lower thermal expansion coefficient than the more common soda lime glass. The lower expansion coefficient reduced the level of thermal shock and allowed this glass […]
Beer Bottle Impact Failure Analysis
Glass failure expert analyzed a failed beer bottle to determine if there was a product defect. It was stated that the bottle exploded when it was put into a cooler filled with ice. The failure analysis revealed that the bottle had been hit with a sharp object. The photograph on the left is the bottle […]
Bottle Sealing Requirements
Glass expert discusses a manufacturing defect that can prevent the sealing of a bottle. The client was using a Polyseal 01 with a cap to seal 750 ml bottles of a solvent. These bottles were packaged 4 to a case and sent to customers. During shipping a fixed percentage of the bottles would leak. A […]
Analysis of Failed Glass Baking Dish
Glass failure analysis expert analyzes failed glass baking dish”Pyrex”. Traditionally, glass baking dishes have been made from annealed borasilicate glass (i.e. Pyrex glass). Now baking dishes are made from tempered glass. The glass is still called pyrex but it is really tempered glass (soda lime). As a result of this change, the newer dishes are […]