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By Gary Mauer - Window Cleaning Network -
"Quality test for tempered glass roller side" - presented at GPD 13

"Quality test for uncoated tempered glass surfaces"  - presented at GPD 11
           Download from - Download from WCN
   "Monitoring problematic fabricating debris defects on tempered glass surfaces"- presented at GPD 09
   Window Cleaning Network Bulletin "Scrapers & Fabricating Debris" - 2017
   Quality checks by fabricators? 2005 article
   Fabricating Debris Issues - 2002 article in WindowTalk (UK)

By Dan Fields - Fields Company - 
   Outline of Scratched Glass Seminar at Window Cleaning Network Picnic in Oconomowoc, WI, July 27, 2002.
Construction Window Cleaning A Primer
Glass Quality
   Stop Scratched Glass
What every window cleaner should know

International Window Cleaning Association
   IWCA official position - since 2004
   IWCA article - The Invisible Intruder"
   IWCA "Talking Points - explaining the IWCA position
   IWCA Open Letter to GANA - November 19, 2007

Maximizing Ceramic Furnace Roll Performance - 1999
    Download GPD version from Glassfiles - Download from WCN 
    By Renald D Bartoe, Frederick Caillaud, Dr. John Dodsworth and Jerry Osele
    Classic glass industry article intended to promote critical thinking on tempering furnace roller use and maintenance. The authors emphasize underlines the importance of plant cleanliness, roller & furnace cleanliness and maintenance, dust control, and state that "Effective use of the glass washer is critical to every tempering operation... The glass washer must be operating properly with the detergents, brushes and rinse water at the manufacturer's recommended settings.  Maintenance of the glass washer is equally important to ensure the glass is clean and without residue or debris that will be carried into the furnace."
The article concludes with this statement, "
Roller quality and stability are essential as are the cleanliness of the factory and the furnace, the operating practices, and glass cleanliness. Defects in tempered glass can usually be identified, isolated, and resolved through the use of optical microscopy, scanning electron microscopy, and energy dispersive spectroscopy."