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Dgall78
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David Gallagher
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Nice work! I worked for 8+ years for a production potter and they did reduction firing.
I am VERY curious about wood firing.
What kind of clay are you using?
Using oxides for colouring?
How high can you fire using such traditional means?
I have toyed with the idea of attempting to use my wood stove which can easily go to about 1500 degrees and stay there for a few hours.
I would be REALLY curious to pick your brain about such things.
Hi mih,
The clay I was using then was standard (thats a company) 258. its a great multipurpose clay... done every thing from raku to wood fire with it. Great student clay.
Wood firing.... well when I say "wood fire" its a pretty specific thing. In a kiln fired for a couple days up to cone 12 or so. Which is 2390 deg/f approx. The color comes from melted wood ash which gets thrown through the kiln by the draft.
The wood stove idea is a good one, I actually had it too! but you'll need a really low fire clay.
here is some info on the cone temps which will help you pick the clay
Cone 022 10850F Lusters
018 1238 "
06 1840 Bisque, low fire glaze, raku
01 2030 Earthenware
1 2057 "
5 2156 Stoneware
10 2300 Stoneware, porcelain
12 2390 Porcelain
What your talking about is really what most people call "pit firing", also check out "barrel firing". If you google them you will come up with some info I'm sure.
I would sugest getting your pots bisque fired first, if you fire the green ware you'll get alot of breaking and the clay won't be very stable since you have to the quartz inversion to happen which happens at about cone 06.
Then its pretty simple fill the container up with something that burns (usually saw dust) and some oxides... copper, iron, ect. Organics are fun too, bananna peels for example will give you some cool greenish colors.
The wood stove could be used as a barrel I think. The problem with the wood stove and logs is how to keep feeding it and not smashing the pots. But its sure worth a shot.
Well, let me know if this helps. good luck
Dave
Wow!
Thank you so much for this info!
After thinking more on it and running a test, there is no way I can get my wood stove to stay at even a low temp for a sufficient amount of time.
I became concerned with starting a chimney fire at one point!
So we have kinds decided that we will wait until spring to conduct our first trial "Pit Kiln" as you put it.
Ok, and the thing abotu the banana peel, that is histerical.
I wonder what the chemical/mineral being released is creating the greenish hue? Maybe I could throw in some childrens "Flintsones(tm)" Chewable Vitamins and see what happens. I mean those have iron and potassium and a host of other nifty things in them.
It is the potassium... the vits may work. That would be histerical. There are a ton of things you can use, copper wire being the most common.
Good luck with the experiments.... oh, and I dont know if I mentioned it, but you can also do all this by just digging a hole in the ground, or building a big bon fire.... thats how it was done in the way back times... still works, and its a great excuse to bring out the marshmellows!
That's what appeals to me about it.
The big 'ol reduction fired kilns were great, but there was too much "Mass Production" feel to it. (Which is what it was all about.)
We will dig down but we will also have to build up some what I think. Typically we only have about 8 14 inches of soil and then its basalt.
I think I still have unch of Iron Oxide and rutile and a little bit of cobalt, (and even some lead frit), laying around I can throw in.
I am VERY curious about wood firing.
What kind of clay are you using?
Using oxides for colouring?
How high can you fire using such traditional means?
I have toyed with the idea of attempting to use my wood stove which can easily go to about 1500 degrees and stay there for a few hours.
I would be REALLY curious to pick your brain about such things.
Thanks for sharing your work with the rest of us.
mih-
--
*Is given to fits of semi-precious metaphors.*
Visit the Soylent Media Site [link]
The clay I was using then was standard (thats a company) 258. its a great multipurpose clay... done every thing from raku to wood fire with it. Great student clay.
Wood firing.... well when I say "wood fire" its a pretty specific thing. In a kiln fired for a couple days up to cone 12 or so. Which is 2390 deg/f approx. The color comes from melted wood ash which gets thrown through the kiln by the draft.
The wood stove idea is a good one, I actually had it too! but you'll need a really low fire clay.
here is some info on the cone temps which will help you pick the clay
Cone 022 10850F Lusters
018 1238 "
06 1840 Bisque, low fire glaze, raku
01 2030 Earthenware
1 2057 "
5 2156 Stoneware
10 2300 Stoneware, porcelain
12 2390 Porcelain
What your talking about is really what most people call "pit firing", also check out "barrel firing". If you google them you will come up with some info I'm sure.
I would sugest getting your pots bisque fired first, if you fire the green ware you'll get alot of breaking and the clay won't be very stable since you have to the quartz inversion to happen which happens at about cone 06.
Then its pretty simple fill the container up with something that burns (usually saw dust) and some oxides... copper, iron, ect. Organics are fun too, bananna peels for example will give you some cool greenish colors.
The wood stove could be used as a barrel I think. The problem with the wood stove and logs is how to keep feeding it and not smashing the pots. But its sure worth a shot.
Well, let me know if this helps. good luck
Dave
Thank you so much for this info!
After thinking more on it and running a test, there is no way I can get my wood stove to stay at even a low temp for a sufficient amount of time.
I became concerned with starting a chimney fire at one point!
So we have kinds decided that we will wait until spring to conduct our first trial "Pit Kiln" as you put it.
Ok, and the thing abotu the banana peel, that is histerical.
I wonder what the chemical/mineral being released is creating the greenish hue? Maybe I could throw in some childrens "Flintsones(tm)" Chewable Vitamins and see what happens. I mean those have iron and potassium and a host of other nifty things in them.
Again, thanks for all of your insights.
I will let you all know what happens.
mih-
--
*Is given to fits of semi-precious metaphors.*
Visit the Soylent Media Site [link]
Good luck with the experiments.... oh, and I dont know if I mentioned it, but you can also do all this by just digging a hole in the ground, or building a big bon fire.... thats how it was done in the way back times... still works, and its a great excuse to bring out the marshmellows!
The big 'ol reduction fired kilns were great, but there was too much "Mass Production" feel to it. (Which is what it was all about.)
We will dig down but we will also have to build up some what I think. Typically we only have about 8 14 inches of soil and then its basalt.
I think I still have unch of Iron Oxide and rutile and a little bit of cobalt, (and even some lead frit), laying around I can throw in.
Sounds like a potential poisonsous brew.
mih-
--
*Is given to fits of semi-precious metaphors.*
Visit the Soylent Media Site [link]
--
mana manah!
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