ISO 9177-3:1994
Mechanical pencils — Part 3: Black leads — Bending strengths of HB leads
Mechanical pencils — Part 3: Black leads — Bending strengths of HB leads
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Mechanical pencils — Part 3: Black leads — Bending strengths of HB leads
Specifies bending strengths and a test method for black leads of HB hardness degree used for mechanical pencils for technical drawings.
| Edition | 1994 |
|---|---|
| Standard Part No | 3 |
| Published Date | 1994 |
| Published By | International Standardization Organisation |
| Page Count | 3 |