Spread powders of calcined gypsum on the specially made gauze bandage to make plaster bandage. Through absorption of water, the calcined gypsum can crystallize. The crystals of it, being of a long narrow shape, interweave one with another. They are very firm. Make the plaster bandage wet, and tie the bandage round the limb several times, making a tube type or a multiple-layer plaster support, then, wrap the tube or support with gauze bandage. After solidifying, it will become a sturdy shell with an effective fixation to the limb. The joint of limb must be fixed in a functional position or special position needed.

The advantage of this is that it can mould a form according to the shape of the limb. So the fixation is reliable. The disadvantage is that it is of no elasticity, so, after fixation it may become over-tight or over-loose, and the tightness can not be adjusted. It is not suited for applying pads. Improper plaster fixation may influence blood supply of the limb or result in compression sore. The range of fixation is so large that it usually should exceed the joints during the period of fixation. So, if the patient pays no attention to muscular contraction exercises of the fixed limb after removing the plaster bandage, there may occur sequelae of ankylosis, hindering recovery of limb function.