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Obvara Firing Technique


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#21 Marcia Selsor

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Posted 12 October 2013 - 09:19 PM

I am back and in Minneapolis firing Obvara at the alternative firing workshop. Chack aesthetic topic? I posted some photos.I think the color variation comes from the temperature of the piece and how long you leave it in the air after putting it in the solution.
Marcia

#22 Tom Banfield

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Posted 14 October 2013 - 02:39 PM

Did my first Obvara firing Saturday. What a blast!!! Is there a need for any additional sealer or finish, like wax or acrylic? They have a great feel and look as is. Anxious to do many more. Not the best picture, but some idea of my results.
Tom Banfield

#23 Marcia Selsor

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Posted 14 October 2013 - 07:52 PM

Check out the Obvara pics on the ALternative firing conference in Aesthetics
marcia

#24 Marcia Selsor

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Posted 15 October 2013 - 06:20 AM

Marcia, I just introduced a fellow potter that does pit firing to the Obvara youtube vids, looks like a new convert.
 
He was as amazed as I when the pots don't explode on water cooling.
 
He and I were discussing the possibility of adding other ingredients to the beer mash mix like Miracle Grow  which has metal sulphates for different coloring possibilities.
Wyndham


Some people at the conference mentioned others who add beer. You'll have to try it.
marcia

#25 Marcia Selsor

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Posted 16 October 2013 - 06:52 AM

I am back. Please post your Obvara results and we can compare notes.
Marcia

#26 Up in Smoke Pottery

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Posted 23 October 2013 - 09:11 PM

Here are a few from our last firing.

Attached File  Up in Smoke Pottery 597.JPG   214.79KB   1 downloadsAttached File  Up in Smoke Pottery 598.JPG   220.55KB   1 downloadsAttached File  Up in Smoke Pottery 602.JPG   196.37KB   0 downloadsAttached File  Up in Smoke Pottery 599.JPG   181.98KB   0 downloads

 

thanks,

Chad

 



#27 Marcia Selsor

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Posted 24 October 2013 - 07:14 AM

wow! The second from left is my favorite. Nice Obvara! The "eyes" are traditional marks. I like the lichen too.
Thanks for posting.

Marcia

#28 Evelyne Schoenmann

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Posted 24 October 2013 - 08:26 AM

Chad, those are absolutely beautiful Obvara pots. How did you get the lichen effect? Did you mix the brew on the basis of Marcia's recipe?

Thanks for sharing!

 

Evelyne


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#29 Marcia Selsor

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Posted 24 October 2013 - 09:22 AM

The lichen patterns seem to grow on smooth surfaces.
More dramatic color contrasts seem to occur on textured surfaces.
Marcia

#30 Evelyne Schoenmann

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Posted 24 October 2013 - 10:05 AM

Thank you for the information, Marcia. I love the lichen pots! I'am interested what brew Chad made...


Evelyne Schoenmann
Studio: schoenmann ceramics
In love with alternative firing methods
www.schoenmann-ceramics.ch


#31 Up in Smoke Pottery

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Posted 24 October 2013 - 02:29 PM

1 Kg flour, 1 Tbsp sugar, 2 packets yeast, in 10 L of water.  I haven't strayed much from the recipe I got from Jane Jermyn's FB group last year.  This last group was done in 15 L batches for a workshop, we made a total of 45L of Obvara.



#32 Up in Smoke Pottery

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Posted 24 October 2013 - 02:34 PM

The lichen patterns seem to grow on smooth surfaces.
More dramatic color contrasts seem to occur on textured surfaces.
Marcia

Marcia, I have the lichen pattern grow on not smooth surfaces also.  I currently thinking it has to due the breakdown of the the obvara mixture, after the gas in the mix has burned/escaped.  The lichen patterns seem to show up at the end of the firings.  Its on my notes for the next firing in the spring.



#33 Marcia Selsor

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Posted 24 October 2013 - 05:52 PM

I'll have to watch that. We got some beautiful lichen on rough and burnished pieces at the Alternative Firing conference. But I'll have to go back and look at the photos to see if we had more lichen on the second day.
I used a week old mix for a second round of firing in my own studio. I'll have to look closer there too.
Thanks for the notes. I'll see if I can let you know more explicitly about our firings.
Marcia

#34 Marcia Selsor

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Posted 24 October 2013 - 07:34 PM

Here are some of the results from the PC Alterntive Firing Conference in Edina, MN.
The first 2 were fired on the first day.The next 2 were fired on the second day using the same batch.of mix. Pretty much the same from Jane Jermyn, See above post by Up in Smoke. So these may not go with your lichen observation.Some were burnished but some were not burnished.

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#35 Up in Smoke Pottery

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Posted 24 October 2013 - 07:59 PM

Marcia, love the 3rd photo.  Definitely need to play more, right now i'm just guessing and taking notes on the firing.  If that is week old obvara i may need to play with letting mine age more.

 

Thanks,

Chad



#36 Marcia Selsor

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Posted 24 October 2013 - 08:34 PM

The first day, the mix was three days old. The second day it was 4 day old. I used week old at my house.The third pot was a Russian woman. It is a beauty
M

#37 Evelyne Schoenmann

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Posted 25 October 2013 - 10:47 AM

Thank you Chad for telling us what brew you used. I guess playing around and posting here whenever one or the other is doing an Obvara would be great!

 

Marcia: beautiful pieces! I like the 4th also because of the wavy white rim.

 

Evelyne


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#38 Marcia Selsor

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Posted 26 October 2013 - 08:00 AM

this is from a post in July. I thought I had posted the recipe.
here is the brew:
1 kilo or 2.2 pounds of flour
1 tbsp of sugar
1-2 packets of yeast
10 liters or 2.6 gallons of water
mix, cover and let it ferment for 3 days.
SInce this happens at 1650, colder then raku, and you need the porosity of the clay,reduction might obsure the cool patterns.
This is from Jane Jerlyn's FB page too.Possibly a loose conversion to standard measurements. Her Obvara work is stunning sculptural forms.
Marcia




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