This standard specifies the classification, requirements, test methods, inspection rules and marking, packaging, transportation and storage of inks for water-based ballpoint pens. This standard applies to water-based ballpoint pen inks for general writing and document writing (hereinafter referred to as "ink").
QB/T 4430-2012 Referenced Document
GB 21027 Request in common use of security for student's articles*, 2020-07-23 Update