... Plaster boards are made from gypsum powder of high natrul purity,they are light weight ,enviromental-protective.,passed ISO 9001 SPECIFICATIONGypsum board, Ceiling board ... , Drywall, Paper faced Gypsum board, Building materiala).Main material: gypsumb).for ceiling suspensiond).Normal specification: ... Asia, so many countries in the world ceiling board