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A New Family Of Lead-Free Optical Glasses

January 8, 2007
American Chemical Society
When golfers in the northeastern United States dream of returning to those greens and fairways next spring, they can have some reassurance that inhaling pesticides applied to the turf does not pose a serious human health threat, a new study suggests. Cornell University's Douglas A. Haith and Rebecca R. Murphy report results of the first systematic study of inhalation health risk for 15 pesticides typically applied to golf courses in the northeast.

With environmental regulations forbidding the use of lead in consumer products, scientists in Canada have developed, synthesized and tested a new family of special optical glasses that contain no lead but perform like traditional lead-based optical glass.

J. W. Zwanziger and colleagues set out to understand origins of the so-called "zero-stress optic response," which underpins the properties of glasses used in rear-projection televisions, liquid crystal on silicon projection systems, optical research equipment and other products.

In a report scheduled for the Jan. 23 issue of ACS' Chemistry of Materials, a bi-weekly journal, they describe finding a simple rule for choosing the composition of glass to minimize the stress optic response. The rule predicted the existence of previously unknown optic glasses.

The researchers then synthesized a variety of alternatives to lead-based glass, producing a new family of lead-free, zero-stress glasses with optical properties like traditional lead-based glasses.

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American Chemical Society. "A New Family Of Lead-Free Optical Glasses." ScienceDaily. ScienceDaily, 8 January 2007. <>.
American Chemical Society. (2007, January 8). A New Family Of Lead-Free Optical Glasses. ScienceDaily. Retrieved April 16, 2024 from
American Chemical Society. "A New Family Of Lead-Free Optical Glasses." ScienceDaily. (accessed April 16, 2024).

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