|With support from the window cleaning community
Glass Performance Days (GPD), the world's largest international
technical conference has accepted my proposal to present a paper
called, "Quality test for uncoated tempered glass surfaces" at GPD
11 in Tampere, Finland.
This presentation will stress a variety of real world benefits of
genuine quality control efforts - internal and external.
By the way, they have also approved a
paper called "Characterisation of the Scratch Resistance of Annealed
and Tempered Architectural Glass", by Mr. Sebastian Schula, TU
Darmstadt - which should be of particular interest to anyone who
uses a scraper.
If you're wondering how prestigious an
event GPD is, check out the GPD program
- or visit the GPD website - www.gpd.fi
In house monitoring has been part of my dialog with
fabricators dating back at least to 2005. During a seminar at the IWCA convention that year I asked a fabricator if they used their
own scrapers to check their glass for fabricating debris defects
after cleaning a furnace. The answer at the time was "no."
In an April 2005 article about that convention seminar, Glass Magazine reported
that one of the fabricators said he did
check occasionally with a credit card, and did sometimes find
Since then very little has been published in US glass industry media
about the fabricators' role in minimizing the fabricating debris
GPD is based overseas and actively promotes their
dedication to "transparency, trust and objectivity". GPD
represents a very transparent means of communication with the glass
industry about tempered glass quality - the information is offered
and accepted with no expectation of compromise or negotiation.
Here is the text of the abstract submitted;
"Because the condition of ceramic rollers is directly associated
with glass surface quality, and the condition of rollers is directly
affected by proper glass washing to thoroughly remove fabricating
debris, an ongoing program of testing roller side surface quality
would be of benefit to any horizontal tempering operation. The
author proposes a simple surface quality test for fabricators to
predict the performance of uncoated tempered glass during future
This test employs a common shop microscope to observe the result of
cleaning of uncoated glass with standard metal razors, such as those
historically used by glazers, fabricators, and cleaners."
It will be an honor to represent the window cleaning industry once
again. I'd like to thank the Association of United Window Cleaners (AUWC)
and many individual window cleaners who've already offered their
To learn more about this project, and about the tempered glass
quality issue, please visit my