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ISO 9177-3:2022

Mechanical pencils for technical drawings — Part 3: Black leads — Bending strengths of HB leads

General information
Valid from 26.01.2022
Directives or regulations
None

Standard history

Status
Date
Type
Name
26.01.2022
Main
30.06.1994
Main
This document specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.
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Paper
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Standard monitoring