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When using metal sinker molds, a few words of advice are in order. Make sure your mold is warm and dry, and heat the lead well above the melting point before pouring it into the mold. Otherwise, the molten metal will solidify and form imperfect sinkers before it has a chance to reach all parts of the mold. After a while you'll be able to tell what the best pouring temperature is by watching the color of the molten metal. When pouring sinkers and weights, remember that it's a good idea to scoop the scum and dirt off the top of the molten lead at regular intervals so that it pours with no trouble. 12 Leaders and Connections
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