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ISO 9177-3:2022

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

Publication date:   Jan 26, 2022

General information

60.60 Standard published   Jan 26, 2022

ISO

ISO/TC 10 Technical product documentation

International Standard

01.100.40   Drawing equipment | 97.180   Miscellaneous domestic and commercial equipment

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Scope

This document specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 9177-3:1994

NOW

PUBLISHED
ISO 9177-3:2022
60.60 Standard published
Jan 26, 2022