ISO 9177-3:2022

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

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

OEN:

ISO

Langue:

English

Code(s) de l'ICS:

01.100.40; 97.180

Statut:

Publié

Date de Publication:

2022-01-25

Numéro Standard:

ISO 9177-3:2022