This particular mould is called a blanket mould. The first step is to cover the face in a 3/8" thick clay blanket. The next step is to make a pouring spout at the highest point, in this case the nose. Straws are placed at all the high points, later these will act as vents. I also added a clay strip around the edge which will act as a key for the rubber to lock into the plaster shell.
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