ISO 9177-3
Mechanical Pencils - Part 3: Black Leads - Bending Strengths of HB Leads First Edition
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| Organization: | ISO |
| Publication Date: | 1 January 1994 |
| Status: | active |
| Page Count: | 6 |
| ICS Code (Drawing equipment): | 01.100.40 |
| ICS Code (Miscellaneous domestic and commercial equipment): | 97.180 |
Document History
January 1, 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.
ISO 9177-3
January 1, 1994
Mechanical Pencils - Part 3: Black Leads - Bending Strengths of HB Leads First Edition
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