Scope
GB 21027-2020 covers student articles such as writing, drawing, correction, ink, and coated or printed school-supply materials, and includes a separate row for colored modeling clay. The page transcribes the HMI-controlled metals from Table 1.
Exact limit and units
| Metal | Matrix | Limit | Unit | Basis |
|---|---|---|---|---|
| Sb | Student articles listed in Table 1 except colored modeling clay | 60 | mg/kg | migratable element |
| arsenic (As) | Student articles listed in Table 1 except colored modeling clay | 25 | mg/kg | migratable element |
| cadmium (Cd) | Student articles listed in Table 1 except colored modeling clay | 75 | mg/kg | migratable element |
| chromium (Cr) | Student articles listed in Table 1 except colored modeling clay | 60 | mg/kg | migratable element |
| lead (Pb) | Student articles listed in Table 1 except colored modeling clay | 90 | mg/kg | migratable element |
| mercury (Hg) | Student articles listed in Table 1 except colored modeling clay | 60 | mg/kg | migratable element |
| Sb | Colored modeling clay | 10 | mg/kg | migratable element |
| arsenic (As) | Colored modeling clay | 10 | mg/kg | migratable element |
| cadmium (Cd) | Colored modeling clay | 15 | mg/kg | migratable element |
| chromium (Cr) | Colored modeling clay | 25 | mg/kg | migratable element |
| lead (Pb) | Colored modeling clay | 25 | mg/kg | migratable element |
| mercury (Hg) | Colored modeling clay | 10 | mg/kg | migratable element |
How tested
Section 5.1 states that the migratable-element determination is performed according to GB 6675.4-2014. Section 4.1 also notes an exemption where the obtainable sample from accessible printing, brushing, or coating portions is less than 10 mg.
Enforcement posture
GB 21027-2020 is a mandatory national standard for covered student articles in China. Products outside the standard’s limits are not compliant with the safety requirements for those articles.
History of changes
GB 21027-2020 replaced GB 21027-2007. The standard was issued in 2020 with the 2020 edition’s revised student-article safety requirements.
How it compares
The general student-article row resembles the legacy international toy-migration values for several elements, while the colored-modeling-clay row is substantially stricter for the HMI-controlled metals. The limits are migration limits, not total-content limits.
Sources
Update history
No substantive edit history is available in this build. The full commit record is available in git.