What chemical or combination of chemicals that are applied on a copper pot can putoff the torch light bulb when it is switched on and focused on the pot from a distance.
1. Ordinary torch light with 2.4 volt pencil batteries and 0.5 amper incandescent bulb used.
2. Before focusing the light on the chemical coated pot, torch light front glass removed from the unit.
3. Incandescent bulb filament fails with in a minute of time.