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Improving Security Glass Through New Technology

NCJ Number
Corrections Today Volume: 53 Issue: 4 Dated: (July 1991) Pages: 149-150
E Haak
Date Published
2 pages
A tough protective shield that prevents glass from splintering and a one-way, see-through glass laminate for undetected surveillance are new technologies that improve security glass.
The danger of glass splintering can now be greatly reduced, if not eliminated, with a new composite of a polyvinyl butyral layer and a strong, abrasion-resistant polyester film. Permanently laminated to the protected side of any bullet-resistant, glass-clad polycarbonate or laminate glass window, the protective shield has the clarity of clear glass and provides additional ballistic protection previously available only through several added layers of glass that sacrificed optical clarity. Traditionally, correctional facilities maintain undetected surveillance through two-way mirrors. A recent technological advance gives facility designers the option of eliminating mirrors. A one-way, see-through glass laminate allows visibility from one side while using color and graphics to form a visual barrier from the other side. The opaque images and graphics reproduced on one side disappear when viewed from the opposite side. Any bold image, from a multi-colored photograph to a line-art drawing to text, can now be transposed into any glass laminate, including all-glass bullet-resistant and glass-clad polycarbonate laminations.