Published
This document specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.
Revises
ISO 9177-3:1994
PUBLISHED
ISO 9177-3:2022
60.60
Standard published
Jan 26, 2022
Mechanical pencils for technical drawings — Part 3: Black leads — Bending strengths of HB leads
40.60 Close of voting
Only informative sections of projects are publicly available. To view the full content, you will need to members of the committee. If you are a member, please log in to your account by clicking on the "Log in" button.