Stephani Stephenson on wed 16 sep 09
I know reaid HArvey and others have been working with ceramic water filte=
rs for years.
Tracy Hawkins is putting the idea to good use. interesting clip.
I wonder how the silver layer is put in.
ivor & olive lewis on thu 17 sep 09
The bisque fired filter element is soaked in a solution of Silver nitrate
and then refired at a relatively low temperature.
Silver nitrate decomposes before the temperature reaches 500 deg C leaving
behind a micronised deposit of metallic Silver throughout the clay fabric.
Silver and its compounds have bactericidal properties.