|
After about a minute, depending on the size of the jig, you can separate the mold and take out the jig. It should be perfectly formed with no bad spots. If it isn't perfect, the lead or tin wasn't hot enough or the mold was too cool. After a little experimenting you'll be able to tell just how hot the molten metal must be to pour right. For the best results, pour when the lead or tin has a bluish or purplish color on top. Every so often it's a good idea to scrape the scum off the surface of the lead in the ladle. Figure 94. Pouring molten metal into the plaster mold. As you pour the jigs, keep cutting off the excess lead left at the pour hole with diagonal pliers and add it to the molten metal in the ladle. Once you start pouring it's best to continue until you have poured enough jigs for your needs. If you have two or three molds you can alternate between them.
|
