Tuesday, March 9, 2010

White Shino

This is Ken Matsuzaki's teabowl.

I had someone ask me about a teabowl that they had from Jim Robinson in
Oregon. It had an iron wash and a thick white shino with finger streak marks.

Does anyone know the recipe for this glaze? I have his article on shino's
and put some of the white shino recipes in my book, like snow cap shino,
mino, etc. but thought someone would know more precisely.

I am putting a similar piece abovei:

I, also think a Kuan glaze with zircopax would work but thought I could get
him  a little closer.

Thanks for your help,

John Britt


Kent Harris said...

Hi John,
I wasn't sure if you were asking about the Matsuzaki shino or not...Ken's shino is pure feldspar or granite, applied very thick. He then very carefully fires it to cone 10 over 10 days in the gas kiln. He holds within a few degrees of cone 8 for 6 days going in and out of reduction. When you see the shino in person it is not really white at all, the only way to describe it is like mother of pearl or opal....It is breathtaking. There is no iron slips on his pot, the clay is Tamba clay and is loaded up with iron.

John Britt said...

Kent Harris,

Thank you very much Kent!

Unknown said...

Not quite correct......

The clay is Mogsa Clay ( not absolutely sure of the spelling!) iron bearing and very sandy. He uses an iron pigment which is a naturally occurring mineral a bit like ochre but with a higher iron content....maybe some sort of degraded hematite. This brushed on or dipped irregularly.
Phil Rogers

John Britt said...

Yo Phil,

Nice to hear from you! Thanks for the comment. Perhaps I should post it?


Togeika said...

Phil, Mogusa clay is highly refractory. In the wet state, it looks like the color of "flesh" crayola crayon. Yellowbanks straight up, with a little iron added might work.

Togeika said...

John, I saw this post looking for something else. But I think you later found your answer. I believe it is Mino Shino.
Ken's glaze is mostly straight large particle feldspar.

John Britt said...

Thanks Lee,

Got a solution from Jim Robinson, adding 10% iron to Mino and putting that on then Mino thick. Thanks for thinking of us though.

Togeika said...

I saw your solution but wasn't sure if it was the same question. I've been using the iron under Mino. Helps you avoid toilet bowl white. :^) I've had good luck with making a mogusa using Helmar's clay. I just add a little Redart. It keeps the clay unvitrified, even at high temps, like mogusa.

John Britt said...

I will have to try that. We are testing some cone 6 reduction slips and may include that idea. Using Laterite and om-4 and making sig.

I will be back on shinos soon. Working on some nice stuff I will show you later.