Valley Forge, Pa., August 31, 2005 - Potters Industries Inc., a leading manufacturer of engineered glass materials for the highway safety, polymer additive, metal finishing and conductive particle markets, has leveraged its highway-safety expertise and global network of offices to create a new pavement-marking management division. RETROTECH will provide technical-service solutions for the pavement-marking industry on a localized level. Services include pavement-marking installation assistance, inspection and performance audits.

"RETROTECH is committed to providing customers with the support and training resources they need - when and where they need them - to install, service and maintain high-quality pavement markings," said Chris Davies, technical service manager of Potters Industries. "Our seasoned field troubleshooters provide quick resolution to problems and ensure the highest levels of pavement-marking quality. Additionally, our premium support and training will improve a crew's installation abilities or an inspector's knowledge and confidence."

The division owns a diverse range of retroreflection measurement equipment to respond quickly and effectively to pavement-marking evaluation requests. Most noteworthy is the Gamma Scientific Laserlux® CEN 30 mobile retroreflectometer. The system features industry-standard 30-meter geometry and automated, real-time measurement capability. "This vehicle-mounted system provides quick, simple, reliable, objective and inexpensive measurements at highway speeds," Davies explained. "It is key to collecting a statistically representative sample, without hindering the flow of traffic, nor putting human operators at undue risk."

The Laserlux CEN 30 mobile retroreflectometer provides measurement repeatability within a tolerance of 10%, as measured under supervised testing by the FHWA. The system enables RETROTECH to perform such applications as implementing pavement standards, planning re-striping strategies, measuring performance of different materials-application methods, holding contractors accountable and establishing a pavement-marking management database. "The Laserlux CEN 30 retroreflectometer is a proven, effective tool for ensuring that contractors are putting down a good stripe," Davies continued. "In our experience, all DOTs that use the Laserlux CEN 30 in their quality-control programs have seen an increase in the retroreflectivity of their markings."

About Potters Industries
Established in 1914, Potters Industries uses recycled glass as its primary raw material. Potters Industries operates 21 plants in 11 countries. Major applications for Potters glass beads include their use as: a reflectorizing medium for highway-pavement markings; a fine abrasive for cleaning and finishing metal parts for aerospace and industry; and a conductive medium in gaskets and coatings for the electronics industry. For more information, visit Potters' website at www.pottersbeads.com

About Gamma Scientific
Gamma Scientific is a leading manufacturer of precision light-measurement instruments, including retroreflectometers for sign sheeting, pavement markings and raised pavement markers; photometers and radiometers; spectroradiometers; digital light sources and laser-power meters. The company also offers exacting calibrations in its optical-standards laboratory. For more information, please contact Gamma Scientific at info@gamma-sci.com. Or visit our website at www.gamma-sci.com

Laserlux® is a registered trademark of Potters Industries, Inc.