Mechanical pencils and leads for general use - Classification, dimensions, quality and test methods - Part 2: Black leads (ISO 20318-2:2019, IDT)
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SS-ISO 20318-2:2019
Mechanical pencils and leads for general use - Classification, dimensions, quality and test methods - Part 2: Black leads (ISO 20318-2:2019, IDT)
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This document specifies classification, dimensions, quality and test methods for black leads used for mechanical pencils for general writing, as specified in ISO 20318-1.
Mechanical pencils and leads for general use - Classification, dimensions, quality and test methods - Part 2: Black leads (ISO 20318-2:2019, IDT)
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