Drywall - WikipediaDrywall is a panel made of calcium sulfate dihydrate (gypsum) with or without additives and . A wallboard panel consists of a layer of gypsum plaster sandwiched . Type C gypsum panels provide even greater fire resistance than Type X. As with ... This board is similar in composition to Type X, except for more glass fibres.composition of machine type gypsum plaster,Using Gypsum Board for Walls and Ceilings Section IIt differs from other panel-type building products, such as plywood, hardboard, . used as the base for gypsum plaster, gypsum board and other gypsum products. . a slurry which is fed between continuous layers of paper on a board machine.
composition of machine type gypsum plaster