Product data:Material:mineral fibers mixed with the wet processSurface coating: quality vinyl emulsion paintColor: white(other colors can also chosen)Surface pattern:refer to the specification sheetsDensity:350-420kg/m3Corner treatment:square lay-in tegularAcoustic coefficient:0.4-0.6Fire-resistant properties:Class B1 qualification (GB8625-88)Class A qualification (GB5464-85)Sinking-resistant properties: <3.5mm(JC670-1997)Heat conducting coefficient: