... ,they are light weight ,enviromental-protective.good for human SPECIFICATIONGypsum panel, Ceiling board, Drywall, Paper faced Gypsum board, Building materiala).Main ... made of gypsum powder of high natural purity mixed with glass fiber ,starch, then paper-faced, because their light weight ,convenient ... ,Europe and Asia, so many countries in the world. gypsum panel