This standard specifies the terms and definitions, classification, requirements, test methods and inspection rules, marking, packaging, transportation and storage of automatic compensating mechanical pencils. This standard applies to self-compensating mechanical pencils with lead nominal diameters of 0.5 mm and 0.7 mm.
QB/T 4858-2015 Referenced Document
GB 21027 Request in common use of security for student's articles*， 2020-07-23 Update
GB/T 191 Packaging.Pictorial marking for handling of goods
GB/T 2828.1 Inspection procedure by count sampling part 1: Lot by lot inspection sampling plan retrieved by acceptance quality limit (AQL)
QB/T 1024 Black lead for mechanical pencils*， 2018-07-04 Update