Mineral Wool Ceiling: Technical parameters: Material:wet-method composite mineral fiber Surface coating:quality vinyl latex paint Color:white (other colors available) Superficial decorative pattern:optional Density:260-380kg/m3 Processing of rim angle:no fluting (for open frame),four rims cutting and fluting in the center. Sound absorption coefficient:0.4-0.6 Fireproofing property:qualified (Grade B1,GB8625-88) qualified (Grade A,GB5464-85) Anti-sinking property:no more than 3.5mm(JC670-2005) Coefficient of heat conduction:no more than 0.65W/m.k Anti-bending strength:no less than 250N Size: Length:300,600,1200,or 12",24",36" Width:300,600mm or 12",24" Thickness:6-18mm(rating:1mm) Density:260-380kg/m3,quality mineral fiber is characterized by the content of 90% or above,which can resist pending effectively. No asbestos contained,environment-friendly. Fireproof:Grade A or B1,consistent with GNS6532(technical standard of Taiwan). Few or none organic additives,so fungi do not stir up. No formaldehyde contained,improved starch used for solidification.