Mechanical Pencils and Leads for General Use - Classification, Dimensions, Quality and Test Methods - Part 2: Black Leads
Also Known As:
A standard called ISO 20318-2:2019 is focused exclusively on black leads used in mechanical pencils for everyday writing. For the classification, size, quality, and testing procedures of these black leads, the standard offers guidance and standards. It completes ISO 20318-1, which deals with mechanical pencils' general classification, size, quality, and testing procedures.
The standard aids in creating a uniform and standardized process for the production and distribution of mechanical pencil black leads. It specifies the numerous categories and measurements that these leads must follow, providing lead size compatibility and interchangeability between various brands and models of mechanical pencils.
Additionally, ISO 20318-2 specifies the standards of quality that must be met by black leads in order for them to function well and last a long time. Specifications for elements like lead hardness, line blackness, break resistance, and erasability are included here. In order to measure and evaluate these quality standards and guarantee compliance, the standard also offers test methodologies and processes.
| Edition | 1 |
| ICS Codes | 01.100.40 - Drawing equipment 97.180 - Miscellaneous domestic and commercial equipment |
| Language(s) | English |
| File Size | 2.1 MB |
