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about 1/2 inch deep: one opposite the chin, one over the top of the head, one opposite the back of the neck—all in the center of the margin's width. These holes will line up with lugs and keep the two halves of the mould in line when the other half is poured. Put a little collar of plasticine around the bottom of the neck, G, so that the neck again thrusts free. Grease the surface of the margin or shelf thoroughly, making sure to get a good coating down into the lug holes. Now pour plaster over the head and scrape it clean where it runs over the edge of the shelf so that the dividing crack between the first and second halves of the mould is clearly visible, H. Pack the plaster up over the head, covering it completely. When it is dry, tap the mould gently in a number of places around the crack and pry the two halves gently apart. Remove the plasticine. Fill any inside bubble holes with plaster, smoothing the patch with your finger. The two halves should fit snugly together, I, the lugs of the one half fitting neatly into the lug holes of the other, the only opening being where the neck of the model thrusts out. |
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