iandol on sat 16 aug 03
Dear John Rodgers,
Sad to say, I do not know the answers to your questions. All I have to =
go on is Bone Ash, China Clay and China Stone in those proportions. As I =
said, its a "Brain Teaser".
Best regards,
Ivor Lewis. Redhill, South Australia=20
piedpotterhamelin@COMCAST.NET on sun 17 aug 03
Well we know the bovine, actually oxen, origins of the bone ash.(By the way,
the cow lips were used on the wheel as a smoothing tool). The China Stone is
also known as Cornwall Stone. This is the feldspar. The China Clay is kaolin,
and from my readings, the earliest (1760's or so) English experiments were
utilizing North Carolina kaolin prior to the finding of English pits suitable
for use.
Ivor, my glaze suggestion is also from my readings. I believe that the bisque
temperatures were high; Could be the cone 6 which you state, and my suggestion
for Cone 1 being confused with Whiteware bodies. But the glaze would be fired
at earthenware temperatures. I will return to my books if I can, as I have a
copy of the 1820's Science of Ceramics somewhere to compare our assumptions.
Rick
> Dear John Rodgers,
>
> Sad to say, I do not know the answers to your questions. All I have to go on is
> Bone Ash, China Clay and China Stone in those proportions. As I said, its a
> "Brain Teaser".
>
> Best regards,
>
> Ivor Lewis. Redhill, South Australia
>
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