Making Gypsum Board - Gypsum AssociationTo produce gypsum board, calcined gypsum is mixed with water and additives to form a slurry which is fed between continuous layers of paper on a board.the processing of making gypsum,Typical Process of Manufacturing Gypsum Board - Georgia-Pacific .Typical Process of. Manufacturing Gypsum Board. 1 Raw Materials. 2 Crusher. 3 Grinding Mill. 4 Calcine System. 5 Stucco Holding Tank. 6 Mixer. 7 Forming.