Reid, I haven't jumped in because this is something I remember from discussions several years ago with the folks that produce ceramic filters similar to the Daulton or British Berkefeld type.
They construct the filter element from diatomaceous earth. This gives a (memory here) absolute filteration below 1 micron (99.99%) and particles down to 0.2 microns are removed with close to 98% effectiveness. They somehow use silver nitrate to saturate the filters which is reduced to metallic silver by application of heat. The water takes 10 - 15 minutes to pass through the filter and the prolonged contact with the metallic silver produces the desired bacteriostatic action. Regards, George Martin -- The silver-list is a moderated forum for discussion of colloidal silver. To join or quit silver-list or silver-digest send an e-mail message to: silver-list-requ...@eskimo.com -or- silver-digest-requ...@eskimo.com with the word subscribe or unsubscribe in the SUBJECT line. To post, address your message to: silver-list@eskimo.com Silver-list archive: http://escribe.com/health/thesilverlist/index.html List maintainer: Mike Devour <mdev...@eskimo.com>