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What is ISO/TR 21958 - Test methods to assess scratch and abrasion resistance of spectacle lenses about? ISO/TR 21958 discusses ophthalmic optics. ISO/TR 21958 is an international standard that provi…
Overview ISO/TR 21958:2019 is a technical report from ISO/TC 172/SC 7 that reviews the most commonly used test methods for assessing scratch resistance and abrasion resistance of plastic spectacle le…