How to build a loop for LRL

[Geo]

Hi. Here is the way that i made a loop for my electrostatic detector.

1. We pass the lid from a box of plastic colour 10 krg (it has 30cm diameter).
2. We cut it in the middle, as it appears in the photograph, in order to it is lighter.
3. We wrap the core with 2m wire 0,15mm diameter.