228851

ISO 9177-2:1989

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

standard by International Organization for Standardization , 03/01/1989

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Full Description

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.

 

Product Details

Published:
03/01/1989
Number of Pages:
2
File Size:
1 file , 170 KB
Note:
This product is unavailable in Ukraine, Russia, Belarus
 

Document History

  1. ISO 9177-2:2022


    Mechanical pencils for technical drawings - Part 2: Black leads - Classification and dimensions

    • Most Recent

  2. ISO 9177-2:1989

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

    • Historical Version