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ISO 9177-3:2022
Mechanical pencils for technical drawings
Part 3: Black leads — Bending strengths of HB leads
Part 3: Black leads — Bending strengths of HB leads
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Summary
This document specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.
Notes
60.60 : Norme internationale publiée
Technical characteristics
| Publisher | International Organization for Standardization (ISO) |
| Publication Date | 01/26/2022 |
| Edition | 2 |
| Page Count | 4 |
| EAN | --- |
| ISBN | --- |
| Weight (in grams) | --- |
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26/01/2022
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