The Fermacell dry-lining board is a gypsum fibreboard made from a homogeneous mixture of gypsum and paper fibres.
In the manufacturing process plaster of paris is mixed with paper fibres obtained by the dry shredding of waste paper. These constituents are scattered onto a moving conveyor belt while water is added. The moisturized quilt is then compressed under high pressure to form a continuous slab, which is fed via a curing conveyor belt to a drying oven.
When the slab is fully cured, the two faces are ground smooth and the continuous slab is cut to the required panel size.
Constituents: approx. 82% plaster (as a dihydrate, CaSO4 × 2 H2O), approx. 18% recycled paper fibres.
The Safety Data Sheets relating to the product were made available to the test personnel. A full declaration of the product constituents was also supplied. More detailed technical specifications may be obtained directly from the manufacturer. The remainder of this Report is concerned with an investigation of the biological safety of this material.