Product Specification
1. Ergonomic design & pneumatic comfort – Medium-height backrest with continuous raised lumbar support, molded from high-resilience polyurethane foam; the seat incorporates a pneumatic function for enhanced guest comfort and a silent dual-spring automatic return device (1-2 seconds reset).
2. Anti-accidental-touch writing board – Built-in foldable writing tablet with a wooden writing surface, stored inside the armrest base for space-efficient use; the opening beneath the board ensures convenient access.
3. Sound-absorbing shell construction – Seat and back shells are injection-moulded from high-quality PP with unique acoustic vents, delivering an overall sound absorption coefficient of 0.5 and eliminating echoes within 0.1 seconds.
4. High-density cold-cured foam – Seat cushion density 60 kg/m³, back cushion density 55 kg/m³; moulded as one piece, offering soft feel, excellent resilience, and no deformation after prolonged use.
5. Premium solid wood & fabric – Armrest surface made of high-grade solid black walnut wood; upholstery is imported linen velvet, colourfast for up to five years with strong flame-retardant properties.
6. Robust hardware & corrosion protection – “Zhuang” brand hardware with oil-removal, rust-removal, pickling and phosphating treatment, plus electrostatic powder coating; steel foot base (≥2.5mm thick) and frame receive anti-rust treatment, 18-micron electrophoretic primer and 30-micron epoxy resin spray, passing 400-hour salt spray and 100-hour salt bath tests without rusting.
Detailed Specifications
Upholstery fabric – Imported linen velvet, anti-fading for ≥5 years, flame-retardant and abrasion-resistant.
Seat & back cushions – One-piece moulded polyurethane foam, ergonomically shaped; seat density 60 kg/m³, back density 55 kg/m³, high resilience and non-deforming.
Seat & back shells – High-quality PP injection-moulded as a single piece, featuring acoustic perforations with a sound absorption rate of 0.5, allowing echo-free acoustics within 0.1 seconds.
Return mechanism – Automatic dual-spring return device, reset time 1-2 seconds, operation silent with rubber bumpers at impact points.
Writing tablet – Foldable, built-in wooden writing surface, stows inside armrest base; anti-accidental-touch design.
Armrests – Surface crafted from high-grade solid black walnut wood, elegantly finished.
Hardware & frame – “Zhuang” brand, with full anti-corrosion pretreatment (degreasing, rust removal, pickling, phosphating), electrostatic powder coating. Foot base stamped from cold-rolled steel (≥2.5mm thickness). Chair frame, supports and legs receive anti-rust treatment, followed by 18-micron electrophoretic anti-corrosion primer and 30-micron epoxy resin topcoat. Passes 400-hour salt spray test and 100-hour salt bath corrosion test; paint film adhesion > Grade 2, with certified test reports.
Floor fixing – All screws and metal components undergo standard anti-corrosion treatment; leg fixing bolts with protective covers (optional).
Additional options – Luminous row/seat number plates (no power supply, wiring or maintenance required); cup holder, book net, and other accessories available upon request.
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This auditorium chair (model CH208FC-4) features a 580mm centre distance, 760mm seat depth, 1030mm overall height, 620mm seat width, and 450mm seat height. The built-in foldable writing board has a wooden surface. Seat foam density is 60 kg/m³ and back foam density 55 kg/m³, both cold-cured polyurethane for lasting resilience. The automatic dual-spring return mechanism resets silently in 1-2 seconds, while the pneumatic function maximises seating comfort. Armrests are made of solid black walnut wood, and the upholstery is imported linen velvet with 5-year colourfastness and flame-retardant properties. The high-strength steel frame and “Zhuang” hardware are treated with multi-layer anti-corrosion coatings, passing 400-hour salt spray tests. The PP shells incorporate acoustic vents providing a 0.5 sound absorption coefficient for echo-free acoustics. Ideal for high-end meeting rooms, auditoriums, lecture halls, screening rooms, and multi-functional venues. Optional luminous row plates, cup holders and book nets are also available.
