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ISO 9177-3:2022Published

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

Porte-mines pour le dessin technique — Partie 3: Mines graphite — Résistance à la flexion des mines HB

Abstract / 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

Replaces

ISO 9177-3:1994WithdrawnMechanical pencils — Part 3: Black leads — Bending strengths of HB leadsInternational Standard · Published 30 Jun 1994 · ISO/TC 10