T/NBWJ 04-2026 Note book

Scope

This document specifies the terms and definitions, requirements, test methods, inspection rules, and markings, packaging, transportation, and storage for notebooks. This document is applicable to the production, inspection, and acceptance of notebooks. Item Unit Requirement 1 Number of sheets in the inner core — Should not be less than the nominal value 2 Alignment deviation between two sides (a) mm ≤1.0 3 Opaqueness % ≥75.0 4 Cobb value (Cobb60) g/m2 ≤60.0 5 Basis weight Basis weight of the inner core g/m2 ≥65.0 Cover weight (b) g/m2 ≥100.0 6 Smoothness s ≥20 7 Stiffness (transverse) mN ≥25.0 8 Moisture % 6.0±2.0 9 Sizing mm ≥0.75 The limit of phthalate plasticizers in plastic covers and covers shall comply with Table 2. Table 2 Limits of Phthalate Plasticizers Unit: mg/kg Limit of plasticizer type and corresponding CAS Limit Dibutyl phthalate (DBP) 84-74-2 Total content of the four plasticizers ≤1000 Butyl benzyl phthalate (BBP) 85-68-7 Di(2-ethylhexyl) phthalate (DEHP) 117-81-7 Diisobutyl phthalate (DIBP) 84-69-5 Dipentyl phthalate (DPENP) 131-18-0 ≤1000 Dihydrogenated phthalate (DHEXP) 84-75-3 ≤1000 Dicyclohexyl phthalate (DCHP) 84-61-7 ≤1000 Exemptions are granted for single samples of a single material with a sampling weight of less than 10 mg. 4.7.3 Migration of Specific Elements The migration limits of specific elements in the printing coatings of covers and covers shall comply with Table 3. Table 3 Migration Limits of Specific Elements Unit: mg/kg Specific Element Antimony (Sb) Arsenic (As) Barium (Ba) Cadmium (Cd) Chromium (Cr) Lead (Pb) Mercury (Hg) Selenium (Se) 60 25 1000 75 60 90 60 500 Note: Exemptions are granted for single samples of a single material with a sampling weight of less than 10 mg.

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