I don't think there is an Obvara market here. If there was it would probably be at the March show in Fairhope, or the October show in Kentuck.
And I've never been to either!! There isn't a pair of married cousins around here that would know what obvara or raku is or what it represents. ; >
But, if I were to make obvara, I'd study it as much as possible, and then set out to understand how to make it consistant. I'm not a big fan of chance.
I think form matters, so I'd begin to make 10 or 12 jars,(much like that brown one of yours) and number them on the bottom.
Then, in a notebook list all numbers, and take down the notes as to each one was fired along with the variation of the recipe....because, just like a
glaze recipe your obvara will change with each addition. I do think that a quick plunge in and out of the liquid would be better because if its held in too
long, you should wind up with a soaked piece of bisque.
I'd be interested if the sugar in the recipe is enough to cause some kind of caramelizing on the exterior.... Is that the brown?
Can sorgum be substituted for sugar? It should since both are carbohydrates in different forms.
Someone mentioned re-grinding the flour? I was told that the plain cake flour is more fine than regular flour, if that makes a difference.
Since oils float, the last variation would be the olive oils. I suspect that if too many changes are made then there is a point where it is no longer obvara.
That could be bad or good.
I'd raise the depth of the pit to 12 inches make some firings, and raise it another 6 inches to see if it mattered. I'd line it with bricks, since I found out
that sometimes when pottery (greenware) touches the ground when firing doesn't exceed ceramic temperatures.
There probably aren't many chances going on since what ever happens, can be re-bisqued to clean, tried again or glazed. The situation of attempting
obvara would be a great learning experience. This would be how I'd approach the learning curve of any new method.
You might be able to go to Bing and search "Colonial Isle Dauphine - Indian Pottery Demo" to see a guy and his dog firing pottery.
See you later,