Here's how to make a very simple little fat-burning lamp that is specially designed to be used with fuels that are solid at normal room temperatures, such as the leftover fats from cooking bacon, sausages, duck, lamb, etc.
The reason it is able to do this is that surrounding the wick, there are protrusions in the shape of petals - these capture some of the heat from the flame, which is then conducted down through the body of the lamp and dispersed through the feet, heating the fat reservoir and keeping it liquid and able to flow up the wick.
It's made by Lost Wax Casting using everyday materials - this method is quite easy and can be used to make a wide range of other small metal objects.
In brief, Lost Wax Casting consists of:
- Making a wax model of the object you want
- Encasing the wax model in something heatproof such as clay or plaster
- Melting out the wax
- Pouring molten metal into the space left by the wax
- Removing the mould material and tidying up the finished object
Step 1: Step1: Gather the necessary materials
You'll need something to make the mould. I used decorating filler. Patching plaster or plaster of Paris will all work quite well. Potter's clay can be used instead, but must be pressed into place around the wax model, which isn't easy for delicate work.
You'll need some metal for casting. You can buy pewter or white casting metal in ingot form at good craft stores and online, but I just bought an old (but not antique) dented petwer tankard from a charity shop - it was really cheap.
And you'll need something to melt the metal in - an old food can is good - as wide and flat as you can find.