Matt MacIntire on thu 12 apr 01
Ron wrote:
>> I am wanting to process iron scale/rust for use as a
>> colorant for iron glazes.
Michael Cardew suggested starting with scrap iron and working to black
oxide. I didn't see anything about starting with rust.
I found this in _Pioneer_Pottery_ on P. 149 in a section on preparing
pigments:
"Iron pigments may be made either with the red oxide, or the black. The
latter gives distinctly stronger colours. It may be made by roasting scrap
iron at about 1100 degrees Centigrade in an old pot placed in a suitable
part of the kiln (e.g. the flue). After a few firings it all turns into the
black powdery oxide, which is easy to grind."
Seems to me I tried "roasting" some iron filings once. It didn't seem to
work quite as he described. But I probably didn't get them hot enough
either. I was recollect putting them into a bisque kiln at around 900
degrees Centigrade. Seemed to have little effect.
anyway, why not try "roasting" some scale and see what happens?
good luck...
Matt
Ron Philbeck on thu 12 apr 01
I am pursuing using less refined materials for making glaze. I am
wanting to process iron scale/rust for use as a colorant for iron
glazes. I have plenty of rust, what's the next step? I think I read
somewhere that firing it to a low temp would make it easier to grind
up. Then what? Has anyone done this?
Any help would be appreciated.
Ron Philbeck
Shelby NC
www.cclay.com/rphilbeck
Matt MacIntire on thu 12 apr 01
Why not just use an iron bearing clay? After screening it would already be
quite fine. This would be way easier than grinding iron scale.
Matt
Des Howard on fri 13 apr 01
Ron
Harry Davis, "The Potters Alternative", suggested rust deposits
from scrapyards, he also mentioned rust flakes washed from
an old pipe at a derelict hydroelectric plant.
I have dug & used fine black iron oxide from a gas corroded
pipe found in an embankment, part of a turn of the century
oil shale extraction works.
By the way, the retorts used were 3m dia. firebrick domes,
we camped in them on our weekend trips.
Presently we use something we call "ochre" from a cave in an
old ironstone mine 2 km away, it appears to be a mixture of
limonite, haematite, magnetite, silt & mud swallow droppings.
Des
Ron Philbeck wrote:
> I am pursuing using less refined materials for making glaze. I am
> wanting to process iron scale/rust for use as a colorant for iron
> glazes. I have plenty of rust, what's the next step? I think I read
> somewhere that firing it to a low temp would make it easier to grind
> up. Then what? Has anyone done this?
> Any help would be appreciated.
--
Des & Jan Howard
Lue Pottery
LUE NSW 2850
Australia
Ph/Fax 02 6373 6419
http://www.luepottery.lisp.com.au
Ababi on sat 14 apr 01
In an old ceramic book, that was published here years ago, the writers
wrote, ( he was a chemist, she was a potter): Don't run to the shop, go to
the desert, (our Negev) look for minerals yourself. This is really great,
anytime you need a material, you take your car drive to the Negev, fly to
Alberta take or take a ship to Albany.
But still there were good ideas, like using rust crumbs into glazes in order
to get mottled effect.
I like to test many thing, but in order to get a certain color, I must use a
defiantly exact mineral!
......Ababi in the Northern Negev where you cannot find these beautiful
rocks
ababisha@shoval.ardom.co.il
http://members4.clubphoto.com/ababi306910/
----- Original Message -----
From: "Des Howard"
To:
Sent: Friday, April 13, 2001 3:08 PM
Subject: Re: iron scale for glaze
> Ron
> Harry Davis, "The Potters Alternative", suggested rust deposits
> from scrapyards, he also mentioned rust flakes washed from
> an old pipe at a derelict hydroelectric plant.
>
> I have dug & used fine black iron oxide from a gas corroded
> pipe found in an embankment, part of a turn of the century
> oil shale extraction works.
>
> By the way, the retorts used were 3m dia. firebrick domes,
> we camped in them on our weekend trips.
>
> Presently we use something we call "ochre" from a cave in an
> old ironstone mine 2 km away, it appears to be a mixture of
> limonite, haematite, magnetite, silt & mud swallow droppings.
> Des
>
> Ron Philbeck wrote:
>
> > I am pursuing using less refined materials for making glaze. I am
> > wanting to process iron scale/rust for use as a colorant for iron
> > glazes. I have plenty of rust, what's the next step? I think I read
> > somewhere that firing it to a low temp would make it easier to grind
> > up. Then what? Has anyone done this?
> > Any help would be appreciated.
>
> --
> Des & Jan Howard
> Lue Pottery
> LUE NSW 2850
> Australia
> Ph/Fax 02 6373 6419
> http://www.luepottery.lisp.com.au
>
>
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