NEN-ISO 9180
Technical drawing materials - Black leads for wood-cased pensil - Classification in hardness degrees and diameters
active, Most Current
| Organization: | NEN |
| Publication Date: | 1 May 1990 |
| Status: | active |
| Page Count: | 6 |
| ICS Code (Drawing equipment): | 01.100.40 |
scope:
This international Standard specifies a classification and diameters for black leads used for wood-cased pencils.
Document History
NEN-ISO 9180
May 1, 1990
Technical drawing materials - Black leads for wood-cased pensil - Classification in hardness degrees and diameters
This international Standard specifies a classification and diameters for black leads used for wood-cased pencils.