Mineral fiber ceiling board Features: 1) material: mineral fiber acoustic ceiling board 2) surface: a variety of surface patterns available 3) coating: pvda 4) color: white 5) density: 350-420kg/m 6) fiber content: >=90% 7) fire performance: meet jc/t670-2005 8) fracture load by bending (n):>250n 9) damping index: 3.0 10) noise reduction coefficient: nrc 0.35 - 0.6 depending on the pattern And the thickness 11) light reflectivity: >=85% 12) no asbestos 13) no formaldehyde 14) dimensions: 600 x 600mm, 600 x 1200mm 15) thickness: 7.5mm, 8mm, 9mm, 10mm, 12mm, 14mm, 15mm, 18mm Carton