I Can Make Colloidal Silver at Home
No you cannot make stable colloidal silver at home. You can make a very unstable ionic silver that can be very dangerous.
As Mr. Searle puts it, “Again, it is comparatively easy to prepare sols which will meet the ordinary requirements of the chemical lecturer, but such crude preparations are usually too unstable for medical purposes, or their stabilizing agent or other constituents bring about undesirable complications in the patient. It is, therefore, of the greatest importance that the colloids used by physicians should be prepared with special skill and care.”