"A foundry is a factory that produces metal castings. Metals are cast into shapes by melting them into a liquid, pouring the metal in a mold, and removing the mold material or casting after the metal has solidified as it cools. The most common metals processed are aluminium and cast iron. However, other metals, such as bronze, brass, steel, magnesium, and zinc, are also used to produce castings in foundries. In this process, parts of desired shapes and sizes can be formed."
Well... because Makers "don't need no stinkin factories!", we will be using a low-melt-temp metal (58% Bismuth, 42% tin) which liquefies at only 281 deg F. This means you can use a stove or hotplate to get to melting temperature. We'll be using a simple hot-plate. Also, you can use common materials for your mold such as wood, polymer clay or silicone rubber.
This alloy is about 70% of the density of lead so large objects are fairly heavy, but it is non-toxic. I think it can be suitable for small pendants and key chains and it may be strong enough to be useful for structural parts in light duty mechanisms.
Bring your own prepared mold, or we will use polymer clay to hand-craft molds, and then cast the tin/bismuth metal into it. Also, safety glasses will be needed when actually pouring so bring them if you have them.
Please bring $5 cash to pay for materials (expect about 50-70 g of metal, or 5.7-8 mL), and we'll see you there!