Petr Novák - Pots under influence of tea

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Re: Petr Novák - Pots under influence of tea

Postby Petr Novák » Mar 18th, '13, 13:32

debunix wrote: Happy, happy, happy.

That make us happy! Thank you for sharing, it is very nice of you.

Mirka have just posted a little story about the walnut ash...http://woodfirepotter.blogspot.cz/2013/ ... lnuts.html

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Re: Petr Novák - Pots under influence of tea

Postby debunix » Mar 18th, '13, 14:04

I've got a pair of native black walnut trees that drop most of their nuts on my yard. I wonder how their ash might be different....

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Re: Petr Novák - Pots under influence of tea

Postby chado.my.teaway » Mar 18th, '13, 15:13

Chip wrote:Image



Amazing!. Nice idea!:)

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Re: Petr Novák - Pots under influence of tea

Postby futurebird » Mar 20th, '13, 13:25

Will the ash make it un suitable for those of us with nut allergies I wonder? Probably not, it's all burnt up.

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Re: Petr Novák - Pots under influence of tea

Postby Chip » Mar 20th, '13, 13:36

futurebird wrote:Will the ash make it un suitable for those of us with nut allergies I wonder? Probably not, it's all burnt up.

We need a test subject! :wink:

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Re: Petr Novák - Pots under influence of tea

Postby debunix » Mar 20th, '13, 14:07

The proteins that cause most food allergies should be completely broken down by firing temperatures. Lab glassware for projects involving the sturdiest & most dangerous prion proteins is considered completely safe after being cleaned & then baking, empty, at 350 degrees F (might be off by 25 degrees here, it's been a while) (160 C) for an hour.

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Re: Petr Novák - Pots under influence of tea

Postby Petr Novák » Mar 20th, '13, 15:46

futurebird wrote:Will the ash make it un suitable for those of us with nut allergies I wonder? Probably not, it's all burnt up.
There are just minerals left, creating crystalline structure. No food allergens to talk about...There can be some toxic agents in glazes but in ash glazes are just minerals from living plant- so I am quite sure that there are no lead, barium or other dangerous things...

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Re: Petr Novák - Pots under influence of tea

Postby debunix » Mar 23rd, '13, 16:26

During a review of this topic earlier today, I realized I promised to share a photo of Petr's chawan with tea, but haven't ever gotten around to it. It would be prettier with matcha, and if I ever learn to enjoy matcha, I'll share a new photo of that. Meanwhile, here it is with an infusion of a nice young sheng puerh.

Image
Chawan love by debunix, on Flickr

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Re: Petr Novák - Pots under influence of tea

Postby yalokinh » Mar 24th, '13, 00:35

Thats the first time I hears about walnut ash, thats awesome!
what other ash could be used? any wood ash?

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Re: Petr Novák - Pots under influence of tea

Postby Petr Novák » Mar 24th, '13, 16:09

debunix wrote:to share a photo of Petr's chawan
Nice picture, thanks for sharing!
yalokinh wrote:Thats the first time I hears about walnut ash, thats awesome!
what other ash could be used? any wood ash?
Yes, basicaly any wood/plant ash can create, in certain temperature on the right clay body, a glaze. Usually those are not "perfect"- oxides in such glaze are not in ideal ratio. So such glazes are too runny or too dry or too hard or something. But those unperfection are also part of the fun.

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Re: Petr Novák - Pots under influence of tea

Postby yalokinh » Mar 24th, '13, 17:04

Petr Novák wrote:
debunix wrote:to share a photo of Petr's chawan
Nice picture, thanks for sharing!
yalokinh wrote:Thats the first time I hears about walnut ash, thats awesome!
what other ash could be used? any wood ash?
Yes, basicaly any wood/plant ash can create, in certain temperature on the right clay body, a glaze. Usually those are not "perfect"- oxides in such glaze are not in ideal ratio. So such glazes are too runny or too dry or too hard or something. But those unperfection are also part of the fun.


is there perhaps a list of the look of each ash glaze? I'm interested in seeing the differences. I've seen pottery with almost glowing blue glaze, i don't think those are ash glazes right?

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Re: Petr Novák - Pots under influence of tea

Postby Petr Novák » Apr 14th, '13, 03:46

yalokinh wrote:is there perhaps a list of the look of each ash glaze? I'm interested in seeing the differences. I've seen pottery with almost glowing blue glaze, i don't think those are ash glazes right?


Well, there are many books with many tests and pictures of different ashes. My fovorite is Phil Rogers one http://www.philrogerspottery.com/publications/ Unfortunately I dont know about online place where one can see ash glazes. Glowing blue can be ash glaze, but most probably as mixture of wood ash and few more materials as silica, feldspare...

For those who are interested, there is new post on my blog to read http://potsandtea.blogspot.cz/2013/04/y ... -2023.html

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Re: Petr Novák - Pots under influence of tea

Postby debunix » Apr 14th, '13, 21:26

A summer chawan on a cloudy spring day

Image

Though it was cloudy, there was no rain--just drip, drip, drip of the glaze

Image

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Re: Petr Novák - Pots under influence of tea

Postby futurebird » Apr 14th, '13, 22:13

I'll just say again how much I like the glaze on this one.

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Re: Petr Novák - Pots under influence of tea

Postby Petr Novák » Apr 15th, '13, 15:19

Dear Debunix, your pictures are getting better and better. Wonderful!! Thank you very much for the sharing and, of course, for your support.

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