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In the 1940s, manufacturers figured out how to sand and make safety glasses and goggles for welders, construction workers, and the like. In the early 1960s the U.S. government sponsored experiments testing the ballistic performance of various plastics and glass for potential use in eyewear, using tests similar to those required by today's U.S ...
BS 857:1967 [1] is a currently in-use British Standard specification for flat or curved safety glasses (toughened or laminated) for use in land vehicles, including road vehicles and railway vehicles. The standard specifies the mechanical, safety, impact, and optical requirements as well as sampling and test methods.
The test reports loss of mass to abrasion and impact, expressed as a percentage of initial sample mass. [7] Maximum acceptable loss for the base course of the road is 45%; the more demanding surface course must be 35% or less. [1] The test was developed by the city engineers of Los Angeles in the 1920s. [8]
In 2014, the tagline changed to "Helping our World Work better." Now, ASTM International has offices in Belgium, Canada, China, Peru, Washington, D.C., and West Conshohocken, PA. [1] [2] In April of 2016, the Safety Equipment Institute (SEI) became a subsidiary of ASTM International. SEI is an accredited third-party certification organization ...
Tempered or toughened glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. Tempering puts the outer surfaces into compression and the interior into tension .
BS 1377 Methods of test for soils for civil engineering. BS 1380 Speed and Exposure Index of Photographic Negative Materials. BS 1572 Colours for Flat Finishes for Wall Decoration [5] BS 1870 for safety footwear. BS 1881 Testing Concrete; BS 1852 Specification for marking codes for resistors and capacitors