1. natural material 2. sound and heat insulation 3. fire, water, sound proof 4. light weight, high strength, no shrinkage 1) Raw materialsgypsum ... china6) Fuction, Advantage and UseSound insulation, heat insulation, moistureproof, fireproofs, water-resiatance, non-desulfuration, environmental protection, pure nature, non-radioactive; be ... receipt of the T/T deposit or L/C. fire proof plaster board