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When making molds for other types of sinkers such as the ball or bank, you make a two-piece mold similar to the types made for jigs described in Chapter 7. These can be from plaster of Paris or water putty if you want temporary, inexpensive molds. In making such a two-piece mold, you can have two cavities and pour two sinkers at a time instead of just one. See Fig. 132. So when you get a cardboard box or make a wooden frame for such a mold make sure it is big enough. Figure 132. Sinker mold with two cavities. As noted, the procedures in making a plaster of Paris or water putty mold are similar to those described in Chapter 7. However, instead of using the actual sinker for a pattern you should carve such a sinker pattern from soft wood, wax, or soap. The lead sinker itself cannot be used because it is too heavy and will sink into the wet plaster when it should float in the stuff. Remember that in making a two-piece sinker mold the pattern should be pushed only halfway into the wet plaster. When the first pouring hardens you grease the top and the part of the pattern still visible, and pour the other half.
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