01.100.40
Drawing equipment
| 97.180
Miscellaneous domestic and commercial equipment
Buying
Published
Scope
This document specifies classification, dimensions, quality and test methods for black leads used for mechanical pencils for general writing, as specified in ISO 20318-1.
Life cycle
NOW
PUBLISHED ISO 20318-2:2019 90.20
Standard under periodical review Jan 15, 2024