CAROLRATLI on sun 1 mar 98
I have seen it done......right off the wheel & into the kiln, but 5 minutes to
the reduction chamber?.....come on now!
The pot didn't explode, however the surface was all bloated & wierd, kinda
like volcanic surface.
We also tried it with a pot that wasn't leather hard yet & it blew up.
carol ratliff
Bob Chance on tue 3 mar 98
Brian,
I have heard of wrapping the wet pots in Aluminum Foil before fast
raku firing them. Seems this works the same way a can of water
would--keeps the steam in for a while until the pot gets hot. The foil
crumbles away after a bit.
This is also a technique I have seen for adding metallic salts to a
pit firing. Using vermiculite as an agent to hold soluble salts along with
various fruit peels and vegetable matte--all of this is wrapped in a foil
package with the terra siged pot and fired to low temp in a raku kiln.
This might be an interesting approach for fast fire raku as well sans the
terra sig.
Happy firing
Bob Chance
http://www.furman.edu/~chance/chance.html
Bob Chance on thu 5 mar 98
Grace,
The terra sig pieces are bisqued to 012, wrapped and then fired to 1600F.
Because the foil will disintegrate, you need to build a box of firebrick or
kilnshelf pieces around it to contain the vermiculite.
This kind of firing should always be performed in a WELL VENTILATED space.
Bob Chance
http://www.furman.edu/~chance/chance.html
Gracedart on 03/04/98 02:03:55 PM
To: bchance@ns9000.furman.edu
cc: (bcc: Bob Chance/ART/Furman)
Subject: Re: Re: really fast raku
Bob,
a couple of questions: is the raku firing temp for foil wrapped terra sig
usually lower than most raku glazes? ie: can the 2 types be fired together
?
the technique you described sounds like the prep we ve been doing for 1500
degree sagar firing.
grace
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