This is my first instructable so it may not be the best, just a heads up.
File (To sand down the edge of the crucible)
Water (To clean the metal bits out)
Ok so the first step is to get a fire extinguisher and make sure all the pressure is let out so when you cut into it, it doesn't explode and also empty all of the powder out of it and throw it away. Then when it's all clean find how tall you want your crucible to be by putting it in your foundry and measuring it and marking where your going to cut it. Once you've marked it, you can begin cutting. When you're cutting make sure you cut straight down and keep it a straight cut. You're pretty much done unless you want to file the edges down a little and make them so they're not so sharp, and if you want to clean the metal filings out, just use a hose and rinse them out. Thank you for everyone who enjoyed this tutorial and let me know what I could do different next time to make my tutorial better. Enjoy your crucible and be safe and always always where protective gear to prevent yourself from getting injured or hurt and be careful with the edges of the crucible and saw because they are sharp.