QB/T 1024-2018
Black lead for mechanical pencils (English Version)

Standard No.

QB/T 1024-2018

Language

Chinese, Available in English version

Release Date

2018

Published By

工业和信息化部

Latest

QB/T 1024-2018

Replace

QB/T 1024-2007

QB/T 1024-2018 history

• 2018 QB/T 1024-2018 Black lead for mechanical pencils
• 2007 QB/T 1024-2007 Black leads for mechanical pencils
• 1991 QB/T 1024-1991 mechanical pencil with black lead