The latest news from American Glass Research.

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Volume 10 / Issue 1
We are pleased to announce our first in-person, open-enrollment, training seminar to be held in the Central Valley of California. 
We will be conducting our most popular, 3-day seminar "Fracture 1: Testing and Breakage Diagnosis of Glass Containers", in partnership, at one of the Trinchero Family Estates properties in Lodi, California May 16-18.

This seminar will provide the attendees the key fracture diagnosis techniques that are needed to efficiently solve glass breakage and other performance related problems.  It is well suited for personnel from wineries, brewers, distilleries and glass container manufacturers.

This open enrollment seminar will be conducted at Trinchero Westside Facility 18667 N Jacob Brack Rd, Lodi, CA 95242

Learn more or register HERECONTACT US if you have any questions.
Cursory fracture analysis can lead to misdiagnosis and prevent solving the problem

We have often been asked..."What is the point of conducting a time consuming “Detailed Fracture Analysis” when the fracture pattern clearly identifies the load that caused the breakage?"

The overall aim of fracture analysis is to determine the corrective actions needed to resolve a breakage problem. A conclusion attributing the breakage to the tensile stress magnitude, the severity of the flaw at the fracture origin, or the combination of both is required of a full analysis.

When conducting “cursory fracture analysis” it is easy to misdiagnosis the cause of the breakage and therefore implement corrective actions that will not alleviate the problem and may adversely affect ongoing production which can result in the loss of time and money.

For example, the three bottles above exhibit nearly identical fracture patterns consisting of a single horizontal fracture which separated the bottom in one piece from the remainder of the bottle. However...

The sample on the left was a bottle which contained a carbonated soft drink.  The fracture originated on the inside glass surface at the junction of the sidewall and bottom.  This is a classic internal pressure failure with an inside knuckle origin.  The primary cause of this failure was a severe flaw that is usually forming related.
The sample in the middle was used for a cold filled, non-carbonated juice product that was pasteurized.  This bottle failed as the result of a thermal shock load in which the inside surface was much cooler than the outside surface, a situation referred to as “reverse thermal shock”.  The origin was located on the inside surface and was also a manufacturing flaw.   
The sample on the right was a bottle which contained a carbonated product.  The fracture surface markings were moderately intense and showed that the fracture originated on the outside surface in the heel.  The location of the fracture origin was inconsistent with internal pressure as the breaking load, since internal pressure stresses are typically minimal on the outside surface at the heel.  Furthermore, this bottle would not typically experience significant thermal shock loads or heel impact loads.  Thus, an alternative load must have acted on the bottle at the time of failure. 
Detailed fracture analysis indicated that the bottle failed under the action of a force applied to the center portion of the bottom rather than the bearing surface, as normally intended.  This force is referred to as a “bottom vertical load”.   The cause of failure was an improperly applied force to the bottom, that most likely occurred during capping.

While these three samples exhibited similar fracture patterns, the type of applied load, the fracture origin locations, and the ultimate causes of breakage were significantly different.  Therefore, different corrective actions were needed to remedy the breakage issue in each case.
To read our complete Case Study with additional examples entitled “The importance of detailed fracture analysis techniques to correctly evaluate bottle breakage” download it from our website library HERE.

Announcing two new Latin America Sales Agents

We are pleased to announce that two members of the Agr International sales team will also be representing American Glass Research throughout Latin American.

We would like to take this opportunity to formally introduce Marta de la Torre and Sergio Ruiz to our customers in the region.

Both have demonstrated knowledge and experience in glass container testing, manufacturing and use in filling lines. They both also possess extensive experience servicing the needs of glass industry.  

Marta, based out of Spain, has been representing Agr International for over twenty years.  Sergio is based in Mexico and has been with Agr Intl going on five years. 

If you have any questions about your glass containers or training, Contact US or you can email Marta at and Sergio at

Please join us in welcoming Marta and Sergio to the American Glass Research team.
DID YOU KNOW...         
Did you know… Glass is an elastic material and loads such as Internal pressure, Thermal Shock, Impact or Vertical pressure can cause deformation in the bottle that results in either compression stress or tensile stress. Understanding the location of the tensile stress regions and the expected glass surface strengths in those regions will determine if a container would be expected to break or survive those loads.

2023 In-person Training gets underway in February

Our international open-enrollment, in-person Training begins in February in Delft, the Netherlands with our popular Fracture 1 seminar.

In March, we start in Butler, PA as well as Lake Ammersee/Munich, Germany.  We will also be in Montecchio, Italy, Krakow, Poland and Lodi, California in the first half. 

See our full 2023 Training Schedule for all dates and locations.

Additionally, our on-demand training library is now available.  View all of our on-demand E-seminars including “Sand to Shelf: Essentials of Glass Packaging” 

Private customized on-location training is also available.

To learn more about all of our seminars, visit our Seminar Catalogue and if you have questions or would like to discuss Private Training Contact Us 
American Glass Research
603 Evans City Road, Butler, PA 16001
Tel: +1 (724) 482-2163
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American Glass Research · 603 Evans City Road · Butler, PA 16001 · USA

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