T/NBWJ 01-2018 ballpoint pen

Scope

Scope: This standard specifies the terms and definitions, classification, technical requirements, test instruments, materials and conditions, test methods, inspection rules, marking, packaging, transportation, and storage of neutral pens. This standard applies to general writing neutral pens; Main technical content: - Test methods: - Requirements for initial writing performance: Ink should flow normally within 10 mm. - Writing performance: - Pen head code UF: Line width ≥ 450 mm, no obvious line breaks or fading, uniform line quality. - Pen head code EF: Line width ≥ 400 mm, no obvious line breaks or fading, uniform line quality. - Pen head code F: Line width ≥ 350 mm, no obvious line breaks or fading, uniform line quality. - Pen head code M: Line width ≥ 200 mm, no obvious line breaks or fading, uniform line quality. - Pen head code B: Line width ≥ 150 mm, no obvious line breaks or fading, uniform line quality. - Penetration: ≥ 24 hours, no obvious marks on the back of the writing paper. - Drying time: ≤ 10 seconds, no ink marks on the overlay paper. - Copying performance: The copied lines should remain visible. - Water resistance: ≥ 1 hour, the lines should remain visible. - Lightfastness: ≥ 72 hours, the lines should remain visible. - Storage stability: - Method A: At (50 ± 2) °C for 10 days, test according to 7.1 and 7.2. - Method B: At (40 ± 2) °C and (55 ± 5)% RH for 90 days, test according to 7.1 and 7.2. - Intermittent writing: ≥ 7 days, ink should flow normally within 50 mm. - Writing lubricity: 0.15–0.25. - High-temperature resistance: At (60 ± 2) °C for 24 hours, no ink leakage. - Low-temperature resistance: At (–10 ± 2) °C for 24 hours, no ink leakage.

Development Information

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