iandol on fri 15 aug 03
Dear Friends,
A little brain teaser for some of you.
Can anyone suggest a stable transparent reflective glaze which will fit =
the following body composition.
Bone Ash - six parts; China Stone - four parts; China clay - three and =
a half parts.
To what temperature should I fire this material?
Does any one know the origins of this body or the name of its inventor?
Best regards,
Ivor Lewis. Redhill, South Australia
John Rodgers on fri 15 aug 03
Ivor, I'm curious. What other names are given China Stone, and China
Clay. I don't know either of these. I know many glaze/clay chemicals
have alternate names. Just wondering about these two.
Thanks,
John Rodgers
Birmingham, AL
iandol wrote:
>Dear Friends,
>A little brain teaser for some of you.
>Can anyone suggest a stable transparent reflective glaze which will fit the following body composition.
>Bone Ash - six parts; China Stone - four parts; China clay - three and a half parts.
>To what temperature should I fire this material?
>Does any one know the origins of this body or the name of its inventor?
>Best regards,
>Ivor Lewis. Redhill, South Australia
>
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
>
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>
>Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
>
>
>
John Britt on fri 15 aug 03
Ivor,
I believe that is Spode Bone China which is fired to cone 6.
(Could also be Sevres Bone China depending on the cone).
Can't locate any glazes right now.
John Britt
piedpotterhamelin@COMCAST.NET on fri 15 aug 03
Hello Ivor
You have a Bone China body that in circa 1800 had a fritted glaze made of
Tincal (Borax), Lead and then the usual alkalies with Al2O2 and Silica. The
use of Borax and fritting was the British Industries' attempts to reduce the
factory workers exposure to air born lead. I believe firing temp was around
Cone 1.
Now, do you have any idea why Ironstone China is called by this name?
Rick
> Dear Friends,
> A little brain teaser for some of you.
> Can anyone suggest a stable transparent reflective glaze which will fit the
> following body composition.
> Bone Ash - six parts; China Stone - four parts; China clay - three and a half
> parts.
> To what temperature should I fire this material?
> Does any one know the origins of this body or the name of its inventor?
> Best regards,
> Ivor Lewis. Redhill, South Australia
>
> ______________________________________________________________________________
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
iandol on sat 16 aug 03
Dear Rick,
Good answer friend, but not the first over the line.
Your "Ironstone China" has an interesting history. Seems to have been =
invented round about 1813 by James Mason, son of Miles Mason of Lane =
Delph, Staffordshire. Decorated in "Mandarin style" to imitate wares =
imported from China. It was a "Fine Stone China" imitating porcelain =
without being translucent, was also known as "Patent Ironstone China" =
and was supposed to contain Iron Slag.
Does that help?Best regards,
Ivor Lewis. Redhill, South Australia.
iandol on sat 16 aug 03
Dear John Britt,=20
Looks like you get the Blue Ribbon for being first up with a correct =
answer as to the name and origin of this stuff. My reference give J. =
Spode II, as the inventor of that particular mixture, but said nothing =
about firing temperature. Would like your opinion regarding glazes. =
Wonder what RR and JH could come up with?
Well done friend.
Best regards,
Ivor Lewis. Redhill, South Australia
piedpotterhamelin@COMCAST.NET on sun 17 aug 03
Well, not the first but not out of the race.
Ironstone, from my reading was made from the silica "waste product" of
processing iron from "pudding stone". Some authors state it true, others deny
it, and stated it to be reflective of the wares strength.
Take care
Rick
> Dear Rick,
>
> Good answer friend, but not the first over the line.
>
> Your "Ironstone China" has an interesting history. Seems to have been invented
> round about 1813 by James Mason, son of Miles Mason of Lane Delph,
> Staffordshire. Decorated in "Mandarin style" to imitate wares imported from
> China. It was a "Fine Stone China" imitating porcelain without being
> translucent, was also known as "Patent Ironstone China" and was supposed to
> contain Iron Slag.
>
> Does that help?Best regards,
>
> Ivor Lewis. Redhill, South Australia.
>
> ______________________________________________________________________________
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
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