The latest news from American Glass Research.


Click to view online.
American Glass Research
Volume 2 / Issue 3

Do you know what is in your EP Dust?

As worldwide environmental regulations change it is critical that you know the composition of your Electrostatic Precipitator Dust created during glass melting process to allow for its further use. 

  • Are you monitoring the Sodium, Sulfur and Carbonate levels in your dust?

  • If you are reintroducing the material into the batch, do you know the composition of key elements?

  • Are you aware of the hazardous materials in your EP Dust?

If you need help, AGR can analyze your EP Dust and identify the amount of key elements as well as the presence of hazardous constituents such as Cadmium, lead and Selenium allowing you to ensure proper control of your EP Dust. Contact Us to learn more or visit our website:



AGR is pleased to welcome Dr. Brandon Aldinger to the staff

American Glass Research is pleased to announce that Dr. Brandon Aldinger has joined the staff as a Senior Scientist.  Dr. Aldinger has experience in glass processing, performance testing, fracture diagnosis and chemical strengthening.

Dr. Aldinger received his Ph.D. and M.S. in Physical Chemistry from Cornell University and his B.S. in Chemistry from Penn State University.  He has authored seven peer-reviewed articles and is a co-inventor on a patent application for enhancing the scratch resistance of coated glass. In addition, he is a member of the American Ceramic Society and the American Chemical Society.

Dr. Aldinger will be involved in primary research, fracture diagnosis, stone identification, pharmaceutical services and Training Seminars.  If you have questions for Dr. Aldinger, please “Ask Our Expert.”


AGR will conduct course at 76th Glass Problems Conference

AGR Senior Scientist Peter de Haan will be conducting a “Short Course” entitled Breakage Analysis of Glass Containers at the 76th Conference on Glass Problems to be held November 2-5, in Columbus Ohio. Peter will discuss methods for solving glass container breakage problems through the application of basic analysis techniques and the knowledge of the scientific fundamentals of brittle material fractography.


Contact us if you would like to set up a meeting at the conference, attend a full training seminar or if you would like to schedule private training at your facility.



Extending glass strength with coatings

The practical strength of glass is only a fraction of its theoretical value.  Consequently, significant effort has been expended over the past century to retain a greater percentage of the inherent strength of glass.  These efforts have focused on three aspects of strength as it relates to glass: 1.) Realize a greater percentage of the theoretical strength (alter manufacturing processes to protect the glass surface from becoming damaged during fabrication), 2.) Restore a certain amount of strength after it has been lost due to surface abrasions (use strength enhancing surface coatings) and, 3.) Preserve glass strength by protecting the surface from abrasions (use surface protective and lubricating coatings). 

Over the past three decades efforts have focused on the restoration of glass strength by the use of unique polymeric coatings.  This approach has not received universal acceptance due to the relatively high cost of the polymeric coatings and the technological barriers for their application at today's production rates.  Recently, novel surface coatings such as metal oxide hot end and polymeric cold end coatings have been investigated in an attempt to preserve the inherent strength of as-manufactured glass.  This approach does not deviate significantly from the current application technology but rather attempts to enhance the effectiveness of the hot end and cold end coatings. 

As companies embark on studies of these new technologies, it is important to understand the role, purpose and fundamental principles that govern the application of hot end and cold end coatings.  Our Coating Technology seminar is designed to provide these fundamentals.  Topics covered in our seminar include: 

  • Why surface treatments are necessary to maintain the surface strength of non-refillable bottles.
  • The role of surface treatments in future Lightweighting efforts.
  • The pros and cons of various types of hot end and cold end coatings.
  • How hot end and cold end coatings function to provide surface protection.
  • Deposition parameters and thickness requirements for optimum performance.
  • Measurement techniques to assure that adequate levels of coatings are applied.
  • How to solve problems with coatings such as: label adhesion, closure rusting, high removal torques of closures, product foaming, poor performance, and scuffing.

We invite all interested personnel to attend this seminar prior to beginning to explore new hot end and cold end coatings or application technology.

Click to learn more



Q: Why does my returnable bottle appear to be blue or iridescent after several trips through the filling operation?

A: Many returnable bottles are initially coated with hot end and cold end coatings. After several trips through the caustic washer, the interface between the hot end coating and the glass surface is chemically attacked and the hot end coating is partially dislodged from the glass surface.  This changes the reflective properties of the hot end coating and produces the blue or iridescent appearance that is often noted. Eventually the hot end coating is totally removed, effectively eliminating the iridescent appearance.

Do you have a question to Ask our Experts?



Optical retardation is influenced by both stress and glass thickness

When polarized light passes through a birefringent material such as stressed glass, the incident light is split into two components that are mutually perpendicular to one another. Due to the distribution of stresses in the glass, the velocity of one of these components is less than the velocity of the other. The component that exhibits the lower velocity is termed the slow wave component or is designated as the slow wave direction. When these two light waves emerge from the material and recombine, the degree to which they are out of phase is termed the retardation of polarized light. The amount of optical retardation, R, created is dependent on the stress magnitude, S, the optical path length (or thickness of the glass), d and the stress optical coefficient of the glass, C, according to:  R = S C d



The 2016 Full Annual Training Seminar Schedule is now available with open enrollment seminars being held in the USA, Krakow, Poland, Munich, Germany and Bangkok Thailand. Seminar topics include:


  • Testing & Fracture Diagnosis (Basic, Advanced & Pharmaceutical)
  • Design Evaluation & Lightweighting
  • Batch & Furnace Operations
  • Analysis of Stones
  • Audit of Glass Plant Operations
  • Coating Technology
  • Cord & Annealing
  • Glass Container Technology

Click here to see the full Training Seminar schedule.

American Glass Research
603 Evans City Road, Butler, PA 16001
Tel: +1 (724) 482-2163

Connect with us:

LinkedIn Contact
Forward this email to a friend. Not interested anymore? Unsubscribe.