Mechanical pencils and leads for general use - Classification, dimensions, quality and test methods - Part 2: Black leads
|Publication Date:||1 March 2019|
|ICS Code (Drawing equipment):||01.100.40|
|ICS Code (Miscellaneous domestic and commercial equipment):||97.180|
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.