Published
This document specifies a classification and dimensions for black leads used for mechanical pencils for technical drawings.
Two types of black leads are available:
— polymer leads (designated by the letter “P”);
— ceramic leads (designated by the letter “C”).
WITHDRAWN
ISO 9177-2:1989
PUBLISHED
ISO 9177-2:2022
60.60
Standard published
Jun 1, 2022
Mechanical pencils for technical drawings — Part 2: Black leads — Classification and dimensions
60.60 Standard published