ISO 20318-2:2019

ISO 20318-2:2019 Mechanical pencils and leads for general use - Classification, dimensions, quality and test methods - Part 2: Black leads

standard by International Organization for Standardization, 03/01/2019

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ISO 20318-2:2019 specifies classification, dimensions, quality and test methods for black leads used for mechanical pencils for general writing, as specified in ISO 20318-1.

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