Pat Southwood on sat 27 nov 04
Hi,
As part of a current bursary I am working with a family of Norfolk =
thatchers.
One of the threads that I am persueing is glazing with reed ash.
I have so far only had 1 reduction firing, using the standard 40 40 20 =
recipe.
So far I have got a white, slightly opalescant, opaque glaze.
I know Norfolk thatching reed is high in silica and potassium, so this =
is what I was expecting.
Can someone tell me if it's a bit like a Nuka glaze, it sounds like it =
to me.
Lee Love, Mike Martino, is anyone using old thatch in Mashiko?
Euan told me he uses tatami. he gave me a few pointers.
Is anyone else doing this?
Would love to discuss stuff if so.
Best,
Pat.
pat@southwood4.fsnet.co.uk
I tried just laying the reed flower on a platter, it's subtle, but nice.
=20
Lee Love on sun 28 nov 04
Pat Southwood wrote:
>Can someone tell me if it's a bit like a Nuka glaze, it sounds like it to me.
>Lee Love, Mike Martino, is anyone using old thatch in Mashiko?
>Euan told me he uses tatami. he gave me a few pointers.
>Is anyone else doing this?
>
>
Hi Pat,
It is hard to compare the glazes without seeings them.
Can you put up photos? I am guessing that your reed ash is more like
rice straw ash than it is rice hull ash. The rice hull ash is more
refractory, has more silica in it than the rice straw ash.
Rices straw ash is used in many glazes but rice hull ash is
mostly used only in nuka. I think I have a hagi recipe that uses it too.
Euan uses the outer coating of tatami straw to put marks on
his hanjiki (half porcelain) pots. He gets cast away tatamil and
just uses the outer covering, pulling the straws apart and laying
them in bundles or wrapping his work in it. He likes the tatami straw
because it leaves a different color on the clay compared to rice
straw. Currently, he is soda firing, which reduces the "color" but
gives a pebbly surface on the flame side. He is always trying
something new.
--
in Mashiko, Japan http://mashiko.org
http://www.livejournal.com/users/togeika/ WEB LOG
http://public.fotki.com/togeika/ Photos!
Mike Martino on sun 28 nov 04
Hi Pat,
I don't use old thatch or tatami, but I do use rice straw ash and it sounds
like what you're using is giving you similar results. Down here in Karatsu,
they call it Madara (mottled), or Wara-Jiro (Rice Straw White). I think Nuka
uses rice hull ash, which is higher in silica and gives more opaque whites.
My recipe for this material is:
Rice straw ash 4
Mixed wood ash 4
Kamado Feldspar 3 (Substitute with other spars freely)
My experience with this type of glaze is that if you reduce late in the
firing, the glaze tends to yellow, especially if you're using an clay body
with lots of iron (would that be an 'ironic clay body'?;) I oxidise after
1150 degrees celcius, and get a nice white color.
There are pics of my Madara glaze on my website at:
www.potteryofjapan.com/3rdfiring/3rdtry.htm
On the larger pieces I laid it on a little too thick so it is too much solid
white. The glaze likes to be fairly thick or it tends to go clear during
firing. Also, a slow cool (at least 48 hours)down helps the color
development.
Oh, I almost forgot: If you're making your own ash keep a hose or large
barrel of water nearby to douse the ash with after it burns black, don't let
it burn until it goes white or grey because you're losing the phosphate if
you do that.
Let me know how your experiments go, with pictures if possible! : )
Mike
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
mike martino
in taku, japan
muchimi@potteryofjapan.com
www.potteryofjapan.com
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG]On Behalf Of Pat Southwood
Sent: Sunday, November 28, 2004 8:02 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Norfolk Nuka ?
Hi,
As part of a current bursary I am working with a family of Norfolk
thatchers.
One of the threads that I am persueing is glazing with reed ash.
I have so far only had 1 reduction firing, using the standard 40 40 20
recipe.
So far I have got a white, slightly opalescant, opaque glaze.
I know Norfolk thatching reed is high in silica and potassium, so this is
what I was expecting.
Can someone tell me if it's a bit like a Nuka glaze, it sounds like it to
me.
Lee Love, Mike Martino, is anyone using old thatch in Mashiko?
Euan told me he uses tatami. he gave me a few pointers.
Is anyone else doing this?
Would love to discuss stuff if so.
Best,
Pat.
pat@southwood4.fsnet.co.uk
I tried just laying the reed flower on a platter, it's subtle, but nice.
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