In construction one of the more common uses of Gypsum is in the production of plasterboard. Gypsum can be classified into two groups, a natural gypsum and a synthetic man made gypsum. The natural gypsum will have been mined from underground quarries. Once it has reached the surface it will be crushed and grinded before it is finally fired at 150°C. Glues and additives are added to help transform this mineral into a slurry in preparation for the production of plasterboard required in the construction of houses. This slurry is then sandwiched between two sheets of cardboard which is glued to the two sheets of cardboard. The next step is to pass these sheets through a series of rollers until it reaches its desired thickness. One of the most critical parts of the production process is to dry out the sheets once it has achieved its thickness. The drying process must be uniformed to allow the manufactured plasterboard to dry at an even temperature, this will ensure a high quality product. Once this has been achieved the plasterboard is cut into standard lengths before being stored in readiness for delivery to site.