source of cobalt

updated mon 13 nov 00

michael wendt on fri 10 nov 00

Idaho has cobalt in the Blackbird district of Lemhi County in southern
Idaho. The word cobalt is said to be a corruption of the German word Kobold
which translates roughly into English as Goblin. Kobolds were thought to
inhabit the dark recesses of mines and hence were black as the cobalt oxide
mined.
Isn't word history fun?
Regards,
Michael Wendt in freezy Idaho where Washington, Oregon And Idaho touch at
the mouth of Hell's Canyon and the river of no return.
-----Original Message-----
From: Keiko Suga & Noel Oard Mapstead
To: CLAYART@LSV.CERAMICS.ORG
Date: Saturday, November 11, 2000 6:37 PM
Subject: Re: Source of cobalt


cobalt used in ceramics originates from a middle eastern process developed
in
mesopotamia, during the babalonian empire. outer walls of babalon are
bricks
of glazed cobalt.

this process was imported to china, and even the cobalt ore material from
kashan
in perisia...from about 1320 at Jingdezhen, china, to present day, chinese
cobalt
underglaze has been established

the chinese used a cobalt to iron ratio first, and then cobalt to manganese
ratio...
eventually the chinese found their own cobalt ores, which contained
variations of
silica or alumina...alumina causing cold blues and silica causing (hot) red
blues

our present day access to pure refined materials as glaze ingredients and
the seger
forumula, cannot duplicate chinese glazes with its site specific materials
and
contaminations

exploring and developing local unrefined materials is worthy of putting into
practice

noel oard mapstead
Queunda@AOL.COM wrote:

> Hello.
>
> Why I am at it, does any one know where cobalt comes from?
>
> Neville Longbottom
> enjoying the crisp, cool weather hear at Hogwarts England.
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
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melpots@pclink.com.

____________________________________________________________________________
__
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.

Keiko Suga & Noel Oard Mapstead on sat 11 nov 00

cobalt used in ceramics originates from a middle eastern process developed in
mesopotamia, during the babalonian empire. outer walls of babalon are bricks
of glazed cobalt.

this process was imported to china, and even the cobalt ore material from kashan
in perisia...from about 1320 at Jingdezhen, china, to present day, chinese cobalt
underglaze has been established

the chinese used a cobalt to iron ratio first, and then cobalt to manganese
ratio...
eventually the chinese found their own cobalt ores, which contained variations of
silica or alumina...alumina causing cold blues and silica causing (hot) red blues

our present day access to pure refined materials as glaze ingredients and the seger
forumula, cannot duplicate chinese glazes with its site specific materials and
contaminations

exploring and developing local unrefined materials is worthy of putting into
practice

noel oard mapstead
Queunda@AOL.COM wrote:

> Hello.
>
> Why I am at it, does any one know where cobalt comes from?
>
> Neville Longbottom
> enjoying the crisp, cool weather hear at Hogwarts England.
>
> ______________________________________________________________________________
> 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.