1. Substrate: The solid wood cube is cooked, dried, sterilized, and insecticidal. The material will not deform, grow insects, contain no harmful gases, and the moisture content does not exceed the national standard.
2. Backrest and seat cushion: high-quality flame-retardant cloth, in line with GB 18401-2010 standard, formaldehyde content ≤300mg/kg.
3. Sponge: in line with GB/T 10802-2006 standard, 65%/25% indentation ratio ≥1.8, 75% compression set ≤8%, rebound rate ≥35%, tensile strength ≥90KPa, tear strength ≥ 2.0N/cm.
4. Hardware: using high-quality hardware accessories, the hardware accessories are tightly spliced, firm, the gap is small and uniform, and it is smooth and free of burrs.