... coal and so on Raw materials: natural gypsum (DSG, phosphor gypsum), modified starch, cardboard, foaming agent, glass fiber, accelerator and so ... , natural gas, heavy oil and diesel oil5. Main materialsConstruction gypsum powder, modified starch, protective paper, foaming agent, water, ... for producing per m2 gypsum board (referenced data) (thickness of gypsum board: 9.5mm)Gypsum powder(CaSO4ยท1/2H2O) ...