Blue-clay?

Where can i find this, what ive heard its sea bottoms and old sea bottoms
(when people dig etc they find it) but then .. how to identify it? .. Ive
found something whitish that atleast i think is what they called blue clay
but as far as i can see when it dries up and is fired it just withers down
to sand if you toutch it .. is this the behavior of this clay or what? :P

Yeye, thanks for any answers and have a good day :

"Tomas Wilhelmsson" wrote in message
news
Where can i find this, what ive heard its sea bottoms and old sea bottoms
(when people dig etc they find it) but then .. how to identify it? .. Ive
found something whitish that atleast i think is what they called blue clay
but as far as i can see when it dries up and is fired it just withers down
to sand if you toutch it .. is this the behavior of this clay or what? :P

Yeye, thanks for any answers and have a good day :

I have not heard of blue clay, actually found blue clay. I guess it does
exist. If you want to have blue clay that you can fire successfully though
just wedge cobalt into it. Small percentage, cobalt is a strong colourant.
Test with cobalt oxide and cobalt carbonate and different amounts.
Wedgewood is like this I think. Goodluck.

Don't know where you are exactly, but in the mid west of the US, blue clay
deposits are used to line earthen dams for man made lakes etc.
here's a link to several blue clay sites. May help you find some..
Tony
http://www.google.com/search?hl=en&i...+clay+deposits

http://tonyolsen.com/up/
"Tomas Wilhelmsson" wrote in message
news
Where can i find this, what ive heard its sea bottoms and old sea bottoms
(when people dig etc they find it) but then .. how to identify it? .. Ive
found something whitish that atleast i think is what they called blue clay
but as far as i can see when it dries up and is fired it just withers down
to sand if you toutch it .. is this the behavior of this clay or what? :P

Yeye, thanks for any answers and have a good day :

More often than not a clay is called a *Blue* Clay because it is high in
carbonaceous material which gives it a blue/grey colour. The ones I have
met in Hampshire UK fired pale pink in bisque, and buff at 1100oC plus

Steve
Bath
UK


In article , tony
writes
Don't know where you are exactly, but in the mid west of the US, blue clay
deposits are used to line earthen dams for man made lakes etc.
here's a link to several blue clay sites. May help you find some..
Tony
http://www.google.com/search?hl=en&i...+clay+deposits

http://tonyolsen.com/up/
"Tomas Wilhelmsson" wrote in message
news
Where can i find this, what ive heard its sea bottoms and old sea bottoms
(when people dig etc they find it) but then .. how to identify it? .. Ive
found something whitish that atleast i think is what they called blue clay
but as far as i can see when it dries up and is fired it just withers down
to sand if you toutch it .. is this the behavior of this clay or what? :P

Yeye, thanks for any answers and have a good day :



--
Steve Mills
Bath
UK

On Sun, 30 May 2004 20:18:58 GMT, Tomas Wilhelmsson
wrote:

Where can i find this, what ive heard its sea bottoms and old sea bottoms
(when people dig etc they find it) but then .. how to identify it? .. Ive
found something whitish that atleast i think is what they called blue clay
but as far as i can see when it dries up and is fired it just withers down
to sand if you toutch it .. is this the behavior of this clay or what? :P

Yeye, thanks for any answers and have a good day :

Don't know about the sea bottoms part. I've heard the
same as Steve relates, that "blue" clay has organics that
fire out. I'd be more inclined to think this comes from
swampy areas or lake bottoms rather than oceans, but
that's just a guess based on where you find organics in
general.

As for the stuff that crumbles after firing: Was it really
"short" to the point of being unworkable before drying,
and really fragile after drying? That could be marl, a
purely calcareous deposit typical of some lake bottoms.
Or maybe yours has enough real clay to be workable,
but too much lime to hold together after firing.

Pure marl does look whitish to blueish or grayish
white. It can be ground up shell bits, or it can be the
result of certain calcium-gathering plant activity.

Hope this helps!


Bob Masta
dqatechATdaqartaDOTcom

D A Q A R T A
Data AcQuisition And Real-Time Analysis
www.daqarta.com

"Tomas Wilhelmsson" wrote in message
news
Where can i find this, what ive heard its sea bottoms and old sea bottoms
(when people dig etc they find it) but then .. how to identify it? .. Ive
found something whitish that atleast i think is what they called blue clay
but as far as i can see when it dries up and is fired it just withers down
to sand if you toutch it .. is this the behavior of this clay or what? :P

Hi :-)

In Norway, we have quite a bit of blue clay (called "blåleire") and I found
a place that makes all kinds of products using it. Unfortunately, the site
is in Norwegian, but there are many good pictures under "produksjon" - just
click on the word behind "neste" to see more.

http://www.potteriet-roros.no/n/html/elting.html

If you google "blåleire", you get a few pictures as well. Looks like it
turns reddish when fired.

Marianne