Mechanical pencils -- Part 2: Black leads -- Classification and dimensions
This standard was last reviewed* in 2015.
Two types are available, black leads in which the binding agent is an organic polymer (designated by the letter "P"), and black leads in which the binding agent is clay (designated by the letter "C"). Classification is made according to the degree of hardness. Part 1 deals with the classification, dimensions, performance requirements and testing.
Document published on: 1989-03-16 Edition: 1 (Monolingual) ICS: 01.100.40; 97.180 Status: Published Stage: 90.93 (2015-07-16) TC/SC: ISO/TC 10 Number of Pages: 2
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