[Clayart] iron red

John Post johnpost89a at gmail.com
Fri Oct 14 13:51:12 EDT 2016


I have a couple of links to things I did when I was working on developing
iron reds in an electric kiln at cone 6-ish ...

http://www.macomb.k12.mi.us/utica/burr/art/JohnPost-2014/main-pages/iron-reds.html

http://www.macomb.k12.mi.us/utica/burr/art/JohnPost-2014/main-pages/kiln-firing-schedules.html

John Post



On Fri, Oct 14, 2016 at 1:11 PM, mel jacobson <melpots2 at visi.com> wrote:

> i did not want to step on toes with any talk of iron red, but......joe and
> i did hundreds for the chinese project.
>
> here are a few tips.
> bone ash is the secret to great iron red.  (calcium)
> low reduction is the other thing that will help...if you are getting dark
> black instead of red it is probably due to too much smoke reduction.
>
> the slow cool is critical, and as dannon will tell you it even changes to
> more red when on the shelf changing from 300 to 200F.  at our farm we even
> had iron reds change over night when the pots were outside. (that is true,
> very true.)
>
> so most of our chinese glazes were fired in oxy, or as i call it...`really
> neutral`. and, if  you fire without all that reduction, they don't run as
> much.  that is how i get away with cone 12 stoneware...i do not over reduce.
> reduction can cause severe warping of the pots. (esp the high iron bodies
> we were using.
>
> we wanted the glazes to move, not run off.
> anyway.
> fun stuff to work on.  just remember, bone ash.
> mel
>
>
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