Lee Love on fri 5 feb 10
On Fri, Feb 5, 2010 at 9:01 AM, Paul Haigh wrote:
>
If I had my Britt high-fire glaze book, I'd look at the section on
no-soda shinos to
>see how they were adjusted (may need to do more than just eliminate the so=
=3D
da).
John's entire book is on google books. Below are the High Alumina
Shinos. I have had good luck with Mino Shino.
Instead of adding the soda ash, you could try spraying from a pump
bottle, on top of the glaze. That way, not as much would get into
the clay body.
http://books.google.com/books?id=3D3DJiLJPahXYWgC&pg=3D3DPA84&lpg=3D3DPA84&=
dq=3D3Dj=3D
ohn+britt+high+alumina+shino&source=3D3Dbl&ots=3D3Dub5nOvRf9B&sig=3D3DkAN7j=
Vqr8Ho=3D
BH-y-TsB0L09nVWo&hl=3D3Den&ei=3D3DO-1sS52sI5KoNvWU2MwE&sa=3D3DX&oi=3D3Dbook=
_result&=3D
ct=3D3Dresult&resnum=3D3D1&ved=3D3D0CAsQ6AEwAA#v=3D3Donepage&q=3D3Djohn%20b=
ritt%20hig=3D
h%20alumina%20shino&f=3D3Dfalse
Or here if link above is broken:
http://tinyurl.com/hashino
--
Lee, a Mashiko potter in Minneapolis
http://mashikopots.blogspot.com/
=3D93Observe the wonders as they occur around you. Don't claim them. Feel
the artistry moving through and be silent.=3D94 --Rumi
Paul Haigh on fri 5 feb 10
I posted a while back describing a shino that blistered and crawled, but se=
ems to be better behaved on the hot side of the pot (facing the wood fire).
Thinking this through a bit more- the fire side would get more ash (derrr) =
and would flux more. The glaze was a carbon trap, but I took out the soda b=
ecause it ripped apart my pots (was raw-glazing/once firing when I ran test=
s). In fact, I added 2-3% bentonite to reduce glaze coming off the rims bef=
ore firing- a small addition, but every bit may hurt. The tests on sake/sho=
t cups were great, so I made a batch and the results are now sometimes grea=
t, and sometimes crap.
I'll re-try with soda and do the tests of course, but do you think that add=
ing back 5-7% soda may solve the issues? (without having the recipe in fron=
t of me- it was not high-clay containing, but not low either). Is it possib=
le that this just wants more flux? If I had my Britt high-fire glaze book, =
I'd look at the section on no-soda shinos to see how they were adjusted (ma=
y need to do more than just eliminate the soda).
Just goes to show- the outcome of a couple of a couple small tests does not=
warrant glazing a quarter of a load of pots. I'm going to run a half dozen=
mugs scattered in the kiln for promising glazes next time.
-pH
http://wileyhill.com
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