PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY PHILIPPE PSAILA / SCIENCE PHOTO LIBRARY
Testing toughened glass. Standards testing work attacking glass with a sledgehammer. This is part of tests to see if security glazing (used in, for example, jewellers' windows) conforms to standards. Photographed at the CNPP (National Protection and Prevention Centre, a safety and security testing body), Vernon, France.
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