Differences Between Fabric Safety Classes A, B, and C & Their Applications

Fabric safety classes (A, B, and C) are defined by strict standards governing harmful substances, ensuring textiles meet safety requirements for different usage scenarios-especially regarding skin contact. Here's a detailed comparison:

1. Class A (Highest Safety Level)

Core Requirements:

• Formaldehyde content: ≤20 mg/kg (the strictest limit).
• No carcinogenic aromatic amines.
• pH value: Close to neutral (typically 4.0–7.5), minimizing skin irritation.
• High color fastness (resistant to fading) and negligible heavy metal content.

Applications:
Exclusively for infant and toddler products (0–36 months), where skin is highly sensitive. Examples include:

• Diapers, underwear, bibs, sleepwear, and bedding (sheets, blankets).

2. Class B (Moderate Safety Level)

Core Requirements:

• Formaldehyde content: ≤75 mg/kg (more lenient than Class A but still strict).
• No known carcinogens.
• pH value: Slightly broader range (4.0–8.5), with minimal irritation risk.
• Good color fastness and controlled levels of harmful substances.

Applications:
For adult products in direct contact with skin. Examples include:

• Shirts, T-shirts, dresses, pants, underwear, socks, and bed linens.

3. Class C (Basic Safety Level)

Core Requirements:

• Formaldehyde content: ≤300 mg/kg (the most lenient limit).
• May contain trace chemicals but within safe thresholds.
• pH value: Allowed to deviate more from neutral (4.0–9.0) but not harmful with indirect contact.
• Moderate color fastness (minor fading may occur).

Applications:
For products with no direct or prolonged skin contact. Examples include:

• Outerwear (coats, jackets), curtains, sofa covers, and industrial fabrics.

Key Takeaway

These categories prioritize safety based on the intensity of skin contact: Class A protects vulnerable infants, Class B ensures daily comfortable and close fitting (skin contact) wearing, and Class C meets the basic safety requirements for non-contact items. When purchasing textiles, be sure to check the safety labels, especially for children's or close fitting clothing, to ensure compliance with these standards.