Reference number
ISO 9177-2:1989
© ISO 2025
ISO 9177-2:1989
Mechanical pencils — Part 2: Black leads — Classification and dimensions
Edition 1
1989-03
Withdrawn
Withdrawn (Edition 1, 1989)

Abstract

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.

General information

  • Status
     : Withdrawn
    Publication date
     : 1989-03
    Stage
    : Withdrawal of International Standard [95.99]
  • Edition
     : 1
    Number of pages
     : 2
  • Technical Committee :
    ISO/TC 10
    ICS :
    97.180  01.100.40 
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