All you need to make colloidal silver is:

A glass of water

A pure silver coin

Two copper wires

A 9 volt battery


Thats it


Fasten the positive end on the battery to the coin.

Fasten the second wire to the negative battery post

Then drop the coin and the second wire in the glass

You should see bubbles coming off the negative wire.

You should see silver coming from the coin into the water.

The water will get a little smokey looking. About four minutes should do it.