Continue to Swirl around Freedom Tower Glass
April 2, 2009
As reported in Tuesday's USGNN.com investigative report,
the glass for One World Trade Center is coming from a Chinese manufacturer
HERE for that story). This news comes after PPG performed significant
development work to produce its Starphire glass at a special thickness.
Tuesday's story included this statement from Port Authority spokesperson
Steve Coleman. "Our contract is with DCM/Solera. That firm
hired a sub, Zetian, an American company, to procure the glass from
a Chinese manufacturer which is producing the 'starlite' low-iron
glass under the Pittsburgh glass license," says Coleman.
Rob Struble, business commercial manager for PPG's Performance
Glazings division, has confirmed to USGNN.com today that PPG
has a technology license, including low-iron (but not Starphire
glass) with Shandong Glass Group. "Our agreement does not allow
them to ship to the U.S. unless it is fabricated in China or part
of a finished good," says Struble.
"We still are of a mind that the glass used on the project
should be the specified Starphire and sourced locally," he
adds. "This does not change our earlier statements of disappointment
that the owners have taken this supply tact."
It is important to point out that this license is not for Starphire
as PPG does not license that technology. PPG licenses low-iron and
other float glass technologies around the world, including oxy-fuel
which enables glass makers to reduce their energy consumption and
environmental impact. PPG's patent for low-iron glass dates back
"Other glass companies also market low-iron and low-iron glass
making technologies globally," says Struble.
In an effort to address the difference between Starphire and low-iron
glass, Struble points out that the quality of low iron glass is
measured in parts per million (PPM) of iron.
"Starphire is under 100 PPM," says Struble. "Our
license agreements in general mandate thresholds on PPM that don't
approach that range."
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