Testing of safety glass by chemists in a lab in United States
United States USA Date:1938 Duration:4 min 3 sec Sound:NO SOUND
A film titled 'Safety Glass' shows chemists test, safety glass in a lab in United States. Samples are made to undergo a variety of tests including humidity tests. Safety glass is processed in a sun arc machine. A half pound steel ball dropped from a height of 16 feet causes only a crack in the safety glass and proves its strength.
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