Mudcat Café message #2131110 The Mudcat Café TM
Thread #104180   Message #2131110
Posted By: GUEST,leeneia
22-Aug-07 - 10:48 AM
Thread Name: Yellow Clay
Subject: RE: Yellow Clay
I suspect that Yellow Clay was fuller's earth, which would have been helpful for cleaning things before the development of detergents. Read all about it here:

If that doesn't work, google fuller's earth definition.