Shipping 2012 Glass Factory Directory print orders!

October 15, 2012

Print copies of the 2012 Glass Factory Directory have arrived and are being shipped today!

You can order on our webpage order form:

2012 Glass Factory Directory ships .pdf edition!

October 8, 2012

Yes, the 2012 Glass Factory Directory of North America is finally here!

We have been shipping our .pdf edition orders starting today.

More information at:

Ordering information:

Great Glass from Australia

August 15, 2012

Glass jars make great glass tumblers

Thanks to the Reddit user who shared this idea!
Back “in the day” many “jars” had snap lids and could be used as tumblers after the contents were gone.

Nutella tumblers

PDF edition of 2011 Glass Factory Directory available

December 9, 2011

After many requests, we have a .pdf version of the 2011 Glass Factory Directory available, completely searchable, same format as print edition, delivered by email only.

Here’s the information on our order form

The Market for Strong Glass Grows

March 31, 2011

The strong “Chemcor” glass developed at Corning almost 50 years ago is now sold as “Gorilla Glass” for use as screens on personal electronic devices using touch screen technology.

Today this glass is made by Corning using a fusion-draw process  in Harrodsburg, Ky., and is an alumino-silicate glass, not the everyday soda-lime glass.  In the fusion-draw process hot glass is pumped into a suspended trough and allowed it to overflow and run down either side. The glass flows then meet under the trough and fuse seamlessly into a smooth, hanging sheet of glass.  Fusion-draw glass is tempered in a chemical bath, and does not use heat-tempering as many sheet glasses do.  The resulting liquid-crystal glass can be made very thin and is very strong.  More than 100-plus handheld devices use this glass.

Gorilla Glass LCD television screens will be available from some manufacturers this year.  Sony showed Bravia  model televisions with these screens at the 2011 Consumer Electronic Show in January.  With production going full-tilt in Harrodsburg, Ky., Corning  is converting part of a second factory in Shizuoka, Japan, to fill the growing orders.

Let U.S. Factories Compete on a Level Playing Field!

November 16, 2010

Beri Fox of Marble King, the only U.S. marble manufacturer left standing, explains why U.S. glass manufacturers are at a disadvantage in competing with producers in other countries. See the clip here:—beri-fox

2010 Edition of the Glass Factory Directory of North America Now Shipping

May 16, 2010

Copies of the print and electronic editions of the 2010 Glass Factory Directory of North America are shipping the week of May 16, 2010. More information about ordering the print edition is available on the order form on our website  or by sending email through any of the links on our home page.

A big “Thank You!” to our many friends in the glass manufacturing industry community who help us keep the Glass Factory Directory of North America up-to-date!

U.S. Glass Manufacturers, International Competition and More Plant Layoffs

February 17, 2010

A recent article on GlassGlobal points out that when the original World Trade Center towers were built in Manhattan in the 1970s all of the glass used was provided by glass manufacturers in the United States.  When the most recent bids for glass for the new World Trade Center buildings were awarded, a Chinese company won the contract for the opaque glass for the first 20 floors and Guardian Industries won the contract for the layered glass on the upper 85 floors.  Guardian will be making the glass at its Carleton, Michigan plant.

More than 15 years ago our office got a call from a float glass customer, who asked us why non-U.S. manufacturers could immediately deliver glass to him when he ordered it, while U.S. manufacturers would schedule a delivery in 1-2 months.  As I told him then, the non-U.S. manufacturers had boatloads of glass sitting offshore, waiting to find customers to whom they would sell and deliver the glass, while the U.S. manufacturers were working on the traditional manufacturing scheduling system which produced glass to fill orders.  The glass sitting on shipping vessels offshore had been manufactured in plants which were subsidized by their governments, and those plants were making glass whether or not the company had orders for it.

As the GlassGlobal article points out, the glass industry in the U.S. cannot grow because glass imports are competing for customers and many of the glass plants which used to be available are gone.  We get calls in our office every few months from someone who wants to build a glass plant in another country by buying and shipping overseas a closed glass glass plant in the U.S.

Many of the U.S. glass plants which are are still operating are not at full capacity.   According to GlassGlobal, the Carleton, Michigan plant which will produce the glass for the new World Trade Center buildings is operating at 85% capacity.

Several glass plant layoffs have been announced since the beginning of the year:

The West Virginia State Journal reported at the end of January that the AGC float glass plant in Flemington (Jerry Run) will lay off 180 workers as it stops production, with the furnace on “hothold.”

The Zeledyne float plant in Tulsa, Oklahoma will be shutting a production line, according to, laying off 210 architectural glass workers.

Owens-Illinois is closing its Clarion, Pa. container plant in July, 2010, and the Clarion News reports local governments and union officials are working to try to keep the plant open.

We are updating our listings for the upcoming 2010 Glass Factory Directory of North America now, and as always, bracing ourselves to hear bad news about plant closings and layoffs as well as looking for the bright side of the North American glass industry.

Glass Researcher Shares 2009 Nobel Prize for Physics

October 20, 2009

Charles K. Kao was named one of three winners of the Nobel Prize in Physics 2009 “for groundbreaking achievements concerning the transmission of light in fibers for optical communication.”   Kao won one-half of the 2009 Prize for his discovery of how to transmit light signals over long distances through glass fibers as thin as a human hair.  His 1966 breakthrough led to the creation of modern fiber-optic communication networks that carry voice, video and high-speed Internet data around the world.

As detailed in the Nobel Committee scientific information, “An intense search for suitable transmission media in the optical domain began at the beginning of the 1960s. The optical fiber was, however, mostly set aside because of its high attenuation…The attenuation of the first optical fibers was  typically 1000 dB/km, implying that only 1% of light got transmitted in twenty meters of fiber.”

“…Charles K. Kao was a young engineer at Standard Telecommunications Laboratories (ITT) working on optical communication.   He started under the direction of Karbowiak, and then became in charge of a small group…They investigated in detail the fundamental properties of optical fibers with respect to optical communication.  In particular, they did not consider the physics of waveguides only…but also the material properties.  Their conclusions were presented by Kao in London in the beginning of 1966…”

“The most important result was that losses in dielectric media were mostly caused by absorption and scattering. The predicted attenuation of a few dB/km was found to be much less than that measured at the time.  Consequently, the latter was predominantly caused by impurities, in particular iron ions. Fibers with glass of higher purity could be a good candidate for optical communication.  Damping caused by bending and waveguide imperfections, as well as  propagation and radiation losses were also analyzed and found to be small.  Single mode fibers were presented as the best transmission medium for optical communication.”

“What the wheel did for transport, the optical fiber did for telecommunications,” said Richard Epworth, who worked with Kao at Standard Telecommunications Laboratories in Harlow, England in the 1960s.  “Optical fiber enables you to transmit information with little energy over long distances and to transmit information at very high rates.”

Kao was awarded the 1999 Charles Stark Draper Prize by the National Academy of Engineering (U.S.) along with Robert D. Maurer (Corning Glass)  and John B. MacChesney (Bell Laboratories) who did subsequent work in fiber optic technology.

More on Building with Glass

July 11, 2009

A recent article in the New York Times had pictures of the new glass boxes suspended over the street at the Sears Building observation tower in Chicago.    The article quotes two glass scientists,  Carlo G. Pantano at Pennsylvania State University and Harrie J. Stevens, director of the Center for Glass Research at Alfred University in a discussion of glass tensile strength.    (The article also includes a bit about how the glass for laptops is manufactured.)

The RoyMech site has information about measuring glass strength, and links to other sites about glass material properties.

Most applications of glass in buildings use laminated glass or tempered glass.

We get many requests for information about glass from school students, and have a number of links to information sources about glass on our website: Places to Learn More About Glass.  We find that many of the visitors to our website head to this area first.   One link there is to an article from a shower door manufacturer, which discusses the U.S. standards for tempered glass. There are also several videos of glass manufacturing and the machinery involved.

In our “Learn About Glass” section we collect interesting articles which we have found about glass on the Internet. Do you have a link to recommend? Post your link below.