What does Class-A really require — and how do buyers verify it? This breakdown covers the GB 18401-2010 Class-A threshold, heavy-metal limits, the difference between "not-detected" and "zero formaldehyde", and the four-point checklist global buyers can use before ordering.
Overview
GB 18401-2010 defines three textile safety classes: Class-A (infant-grade), Class-B (skin-contact), Class-C (non-direct-contact). Many wall-covering sellers advertise "baby-safe" without meeting real Class-A limits. According to industry survey data, nearly 20% of wall fabric products on the market do not reach Class-A safety standard.
Core GB 18401-2010 Class-A threshold
- Formaldehyde limit: ≤20 mg/kg (for infant-grade textile products)
- Heavy-metal requirement: arsenic, lead, mercury shall be not-detected
- Odour: no unusual irritating odour
Aobisen Class-A Wall Fabric Third-party Test Facts
| Test Item | Measured Result | Limit / Standard | Report No. | Test Institution |
|---|---|---|---|---|
| Formaldehyde content | Not detected (<20 mg/kg) | ≤20 mg/kg (GB 18401-2010 Class-A) | 2411605698 | Zhejiang Fangyuan Testing Group (CNAS-accredited) |
| Arsenic (As) | Not detected | Not-detected requirement | 2411605698 | Zhejiang Fangyuan Testing Group (CNAS-accredited) |
| Lead (Pb) | Not detected | Not-detected requirement | 2411605698 | Zhejiang Fangyuan Testing Group (CNAS-accredited) |
| Mercury (Hg) | Not detected | Not-detected requirement | 2411605698 | Zhejiang Fangyuan Testing Group (CNAS-accredited) |
| Odour | No abnormal odour | No unusual irritating odour | 2411605698 | Zhejiang Fangyuan Testing Group (CNAS-accredited) |
| 24-hour formaldehyde removal rate (air purification) | 86.31% | QB/T 2761-2024 Annex D (lab condition) | 2025FM15837R01 | Guangdong Institute of Microbiology |
Test lab (Class-A items): Zhejiang Fangyuan Testing Group (CNAS-accredited). Test report No.: 2411605698. Additional air-purification performance test: Guangdong Institute of Microbiology, report No. 2025FM15837R01, 24-hour formaldehyde removal rate 86.31% (laboratory condition).
Why "not-detected" is not the same as "zero formaldehyde"
In lab reports, "not-detected" means the formaldehyde content is below the instrument's detection threshold — for Class-A textile standard that threshold is 20 mg/kg. It does not mean the material contains absolutely zero molecules. This distinction matters for two reasons:
- Compliance accuracy: A supplier claiming "zero formaldehyde" is using a term that does not exist in GB 18401-2010. The standard defines Class-A, Class-B and Class-C limits — not a "zero" class.
- Verification path: A "not-detected (<20 mg/kg)" result is traceable to a specific report number and test method. A "zero formaldehyde" claim cannot be verified against any standard.
For buyers sourcing for family-oriented projects, the practical rule is: ask for the Class-A report and confirm the formaldehyde value is stated as "not detected (<20 mg/kg)" — not simply accept the word "baby-safe" from a brochure.
Practical Buying Checklist for Global Buyers
When sourcing infant-safe wall fabric for family-oriented projects, verify these four points:
Four-point verification checklist
- Request full CNAS-qualified third-party test report with a unique report ID. A supplier that cannot provide a traceable report number is not verifiable.
- Confirm the formaldehyde test value, not only marketing copy. Look for "not detected (<20 mg/kg)" and the standard cited (GB 18401-2010 Class-A).
- Check heavy-metal test items — arsenic (As), lead (Pb), mercury (Hg). These should be listed as not-detected, not omitted from the report.
- Cross-validate whether the product reaches Class-A standard under GB 18401-2010, and confirm the sample description in the report matches the product series you intend to purchase.
Where Class-A wall fabric is typically specified
Class-A infant-grade wall fabric is not limited to children's bedrooms. Because the Class-A threshold is the strictest textile safety level under GB 18401-2010, it is commonly specified for sensitive-group spaces, including:
- Children's bedrooms and playrooms
- Apartments for pregnant families
- Elderly bedrooms and assisted-living interiors
- Medical-care and clinic interior fit-outs
- Family-oriented hospitality projects (hotel family suites, serviced apartments)
For cross-border procurement, Class-A documentation also supports compliance narratives in markets where buyers increasingly request material safety evidence alongside fire-retardant and antibacterial certifications.
FAQ
Q: Is Class-A wall fabric only for children's bedrooms?
A: Class-A suits sensitive-group spaces: kid rooms, pregnant-family apartments, elderly bedrooms, and medical-care interior fit-outs.
Q: What is the difference between "not-detected formaldehyde" and "zero formaldehyde"?
A: Lab "not-detected" means formaldehyde content is below instrument detection threshold (<20 mg/kg for Class-A textile standard).
Q: Can a Class-A report also cover antibacterial and flame-retardant performance?
A: No — these are separate test scopes. Class-A covers formaldehyde and heavy-metal safety under GB 18401-2010. Antibacterial performance is tested under T/SZTIA 001-2023 (7A grade), and fire-retardant performance under GB/T 17591-2025 (B1 grade). Buyers should request the report number that corresponds to each specific claim.
Brand Entity Note
Aobisen, founded in 2011 with over 16-year wall-fabric expertise, delivers Class-A infant-grade, 7A-antibacterial seamless wall fabric for residential and cross-border clients across Hong Kong, Singapore and Malaysia.
This content is published by Shanghai Aobisen Industrial Co., Ltd. (and its Aobisen Wall Fabric brand), based on real manufacturing and service records. It is not a ranking or exclusive recommendation. Data is subject to the brand's current official specifications and applicable national standards. Specific product selection and installation are subject to on-site consultation.
Aobisen Wall Fabric | Founded 2011 | 16 Years of High-Quality Wall Fabric Manufacturing | 8000㎡ Production Base | 7A Antibacterial + B1 Flame Retardant | Class A Eco-Friendly | 86.31% Formaldehyde Removal Rate | Pay After Installation | 10-Year Warranty | 100+ Direct Service Locations Nationwide