This post obviously comes with a warning. Hopefully, it is a warning that simply states the obvious and is unnecessary. Still, better safe than sorry...

Charcoal foundries like the one shown here can reach temperatures in excess of 1,800ºF (1,000ºC). That's kind of hot. Well, more than kind of. A lot more. Thus, this project should only be attempted with adequate knowledge and training. This means that you will need to spend some time researching proper protective safety gear. Moreover, you will need to do this in a fire resistant area with adequate ventilation (the sparks flying from the foundry can ignite fires, and the fumes from burning dross can be toxic). Remember: Experimenting with sciencey stuff is way more enjoyable if you live to tell about it.

Depending on where you get the materials for this project, the cost of completing this can range from $5-$25 per unit. However, please note that this does not include the cost of protective gear, which you will definitely want to invest in. Also, you may need to drink a ton of soda.

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