1. natural material 2. sound and heat insulation 3. fire, water, sound proof 4. light weight, high strength, no shrinkage 1) Raw materialsgypsum powder, gypsum retaining paper, fiber(wood fiber, paper fiber, fiber glass),cornstarch, vesicant, lightweight aggregate, citric acid, water, adhesive, etc.2) Product Description (size and thickness)Normal size: 2440x1220mm, 2400x1200mm 3600*1200, 3000* ...