{
  "type": "tfc:alloy",
  "contents": [
    {
      "metal": "tfc:copper",
      "max": 0.70,
      "min": 0.65
    },
    {
      "metal": "tfc:tin",
      "max": 0.25,
      "min": 0.20
    },
    {
      "metal": "tfc_ie_addon:lead",
      "max": 0.15,
      "min": 0.10
    }
  ],
  "result": "gtceu:potin"
}