Lava acoustic board

Lava acoustic board is made from volcanic lava particle with perfect quality of sound absorption ,environmental protection and fire prevention .There is no smoke,no smelling and no heating when burnt at 1200 degrees for 4 hours.It's also a kind of ideal material for heat insulation. It could be widely applied for wall decoration,sound absorption, fireproofdoor and other fireproof materials in house decoration , theatre,shopping mall ,night club ,hotel,and hospitaland so on . The fireproof grade is A1 grade ,toxic gas safty gade is AQ1 grade and the environmental protection grade is E0 grade . The specification: 1220x2440x15 mm ,1220x2440x25mm ,and the density is 550-650kg/m3 900x2100x12mm,900x2100x20mm,900x2100x29mm,900x2100x38mm,and the density is 550-560kg/m3.