The latest news from American Glass Research.

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Volume 4 / Issue 2
AGR certifies 7 new Fracture Diagnosticians

We would like to congratulate the first, ever, group of "AGR Certified Fracture Diagnosticians". They successfully completed the 4-day seminar that included both written and practical examinations. The course was held in Munich, Germany. Let's raise a glass to this seminal group aka: "The Certified Seven": Manuela Goßmann, Jens Morgenstern, Josef Möhrlein, Ronny Söllner, Peter Utzmann, Frederic Meyer and Christopher Nuth.

This seminar consists of advanced topics that will provide an in-depth look into key issues related to breakage. The critical focus is on workshops using advanced fracture analysis techniques. Successful completion will earn AGR Certification of your skills for solving complex glass container breakage issues.

"I enrolled in the first, ever AGR 'Fracture 3: Glass Fracture Diagnostician Certification' seminar. My expectations were more than met. This seminar is a perfect means to deepen one's knowledge on fracture analysis. I can therefore confidently recommend this seminar",
said Josef Möhrlein of Weigand Glas.   

This new Open Enrollment F3 Certification Seminar will be conducted two more times in 2017:
  • Krakow, Poland September 19 - 22
  • Butler, PA November 28 - December 1
Visit our Training Catalogue to learn more about the Certification Seminar and all of our Training Seminars. Or Contact Us for more information.
AGR returns to Beijing, China

The Chinese Expert Glass Committee has invited AGR to return to Beijing to conduct two training seminars to additional company members.  

- Fracture 1: Testing & Breakage Diagnosis 
- Evaluation & Lightweighting of Designs

The two seminars the will be conducted the week of July 10 By AGR's Bill Slusser, Director of Research, and Dr. Wenke Hu, Senior Scientist. 

Visit our Seminar Catalogue to learn more about all of our Training seminars.
AGR offering free Impact Seminar at Drinktec

AGR will conduct a free half day seminar entitled "Understanding and Establishing Impact Criteria" during the Drinktec Trade Show, in Munich, Germany. The seminar will be held on Tuesday, September 12, 2017 in a conference room on the Drinktec grounds. 

This instructive seminar will provide insight into the stresses generated in glass containers by filling line impacts, proper measurement of impact levels, and establishment of impact criteria for use in bottle design FEA analysis. This event will be by special invite only.

Contact Us for to receive your invitation, as the attendance will be strictly limited.
Celebrating 90 Years of Service
to the Glass Industry

Continuing on our promise, we will be marking our 90th Anniversary throughout the year with the release of several more of our Legacy White papers.

In 1959, Dr. Richard Mould in collaboration with Mr. Russell Southwick, both of Preston Laboratories, the predecessor and foundation of American Glass Research,
prepared two papers entitled "Strength and Static Fatigue of Glass under Controlled Ambient Conditions, Part 1 and 2" that further defined glass strength and how it should be properly measured.

That was immediately followed by two papers by Dr. Mould under the same title as Parts 3 and 4 in which he further defined critical aspects of glass strength.

We hope you find all four of them interesting. Visit our White Papers Library to download all four and to view all of our White Papers.
AGR to present at Deco '17 in Pittsburgh

Bill Slusser, Director of Research at AGR, will be presenting a talk entitled "Glass Bottle Performance, Strength and Decorating Considerations" at the Society of Glass and Ceramic Decorated Products (SGCDPro) annual conference, Deco '17. To be held at the Sheraton, Station Square April 22-24. Bill will lead off the technical presentations with his talk scheduled for Saturday at 12:30 pm.

His talk will focus on the variable of glass surface strength, the influence of various decorations, and making informed decisions regarding bottle performance as it relates to anticipated loads and the stresses that result.  

If you are not attending the Decorator Conference and have questions or are having performance issues with your glass containers Contact Us.

Now Available

Due to the strong demand for our “Color Atlas of Stones In Glass” book, a third printing was initiated and copies are still available. The book contains 39 stone descriptions and is beautifully rendered with more than 300, original, color images.  

The book is available for purchase directly through AGR or through Amazon.  Click HERE for more information or to order.

Authors Dr. Brandon Aldinger, AGR Senior Scientist and Brian Collins, AGR Research Engineer will be conducting the "Stones in Glass: Analysis and Identification" Training Seminar May 4-5 on the Butler, PA, USA Campus. CLICK to learn more or to register. 
How do you know if glass breakage on your filling line is due to:
- Defects in the glass?
- Poor container design?
- or Abusive handling?

Avoid making expensive, ineffective changes to your filling line. The efficient way to reduce glass breakage is through Fracture Analysis.

With breakage problems a typical (and often inappropriate) corrective action is the adjustment of the line handling.  However, identifying the root cause of failure will ensure implemented corrective actions are effective.

A critical tool to identifying the root cause of breakage is Fracture Analysis techniques which identify the force applied, the flaw at the fracture origin and distinguishes between severe flaws and excessive loads as the ultimate cause.

If the breakage results from severe glass manufacturing defects, the solution is improvements in manufacturing rather than line adjustments.


1. Examine the Fracture Pattern

Fractures do not travel randomly but are driven by the magnitude and distribution of the applied stresses. Proper interpretation of fracture surface markings (ex. ripples and dwell marks) and fracture branching will indicate fracture direction. The unique appearance of the fracture pattern can indicate the type of load applied.

2. Identify the Type and Severity of the Flaw at the Fracture Origin

Surface markings and the fracture pattern allow for the identification of the fracture origin location. Experience and examination with magnification can allow for differentiation between glass melting irregularities, forming defects, or mechanical damage created during handling/processing.

3. Examine the Sample for Contributing Factors such as:
  • Thin glass at the origin and other critical areas.
  • Shape, contour, and bottle dimensions that are out of specification.
  • Glass quality issues such as high annealing or cord stress that contributed.
  • Or additional stresses or damage resulting from a decorating process.
In conclusion, for glass melting or glass forming flaws, corrections at the glass manufacturing facility are needed. For flaws created through abusive handling, changes to handling practices would be required. Likewise breakage due to excessively, applied forces, require a reduction in the load magnitude. Finally, breakage due to container design issues should be corrected through a proper AGR Finite Element Analysis of the design.

Contact Us if you want to discuss your breakage or container design needs, or to submit samples for Fracture Analysis use this Form.
Q: What caused this highly stressed knot in the bottle?   
A: While refractory drip can lead to similar defects, this knot was caused by glass ceramic contamination in the cullet supply. 

If you have questions regarding stones, contaminants or defects in your glass,  you can “Ask Our Experts” or send us a sample for ANALYSIS.

If you would like to learn how to define and quickly analyze stones as well as learn the steps to correct the problem, sign up for our “Stones in Glass: Analysis and Identification” Training Seminar to be held on our Butler, PA, USA campus May 4-5 and October 3-4, 2017.
International Training Seminars will be getting underway in May, June and July on the Butler, PA, USA Campus; Montecchio Emilia, Italy; Krakow, Poland and Beijing, China.
Butler, PA, USA:
- Stone Analysis and Identification May 4-5
- Audit of Glass Plant Operations June 6-7
- Fracture 1: Testing & Breakage Diagnosis June 13-16

Montecchio Emilia, Italy:

- Evaluation and Lightweighting of Designs May 8-9
- Fracture 1: Testing & Breakage Diagnosis May 10-12
Krakow, Poland:
- Glass Container Technology May 16-17
- Audit of Glass Plant Operations May 18-19
Beijing, China:

- Fracture 1: Testing & Breakage Diagnosis July 10-12
- Evaluation and Lightweighting of Designs July 13-14

Visit our Seminar Catalogue to learn more or to register.
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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