gypsum core made from natural gypsum or synthetic gypsum or a combination of both types of gypsum
the board core and long edges are sandwiched between heavy duty paper liners in ivory colour at the front face, light grey colour at the back face
two long edges are recessed / tapered or square
widely used as lining boards for non fire-rated internal drywall partition and ceiling systems in dry areas
Developed countries have their own national standards regulating the production and testing of physical and mechanical properties of gypsum plasterboards. Nevertheless, all norms related to gypsum plasterboards are rooted in American standard ASTM C1396. British standard BS 1230 and Australian / New Zealand standard AS-NZS 2588 are very similar to ASTM C1396, slightly differ in the measuring unit of dimensions as below:
