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ISO 9177-2:1989

Mechanical pencils -- Part 2: Black leads -- Classification and dimensions

General information
Withdrawn from 01.06.2022
Directives or regulations
None

Standard history

Status
Date
Type
Name
01.06.2022
Main
16.03.1989
Main
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.
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