James Bledsoe on fri 14 jul 00
hey Richard
i have received several responses from the group. and i though i was =
posting but it seams that i have been replying directly to members. =
so here is some of the stuff i have sent so far.=20
. . . anyway this is what i am up to.
i am building a small dome similar to the one at school only smaller =
and
with a glaze for mortar. next I will use refectory triangular panels =
see castable equal parts fire and ball mixed with two parts planer =
chips(Saw Dust) all by volume]
approximately 36 inches on a side and 9 inches thick to construct a =
soccer
ball on the outside of the dome.
So, what i propose is a down-draft kiln; the soccer ball is the =
exterior
shell, receiving a number of propane burners spaced along the lower
perimeter. The brick dome is a bag wall. The chimney, starting below =
the
floor, will then pierce the top on center.
Filling the interior of the dome with pottery will turn this into an =
event.
. . .=20
For any one who wonders about "the one at school" it is a brick =
hemisphere
18 feet in diameter and pictures can be seen at the www.calearth.org
at the moment i am working on a glaze to use as cement between the =
bricks=20
and i am puzzled by the notion of water soluble in fired borax =20
In Hamer's Potter's Dictionary it is stated that "to use borax in a =
glaze it must be fritted"i am using the local fines from the mainly =
sandy soil in Hesperia this brown clay melted at 2300f i am able to =
fuse bricks using the simple mix of=20
=20
2 part cal earth,
2 parts Borax, =20
1 part Portland cement =20
now because of using raw borax is this glaze "water soluble"? =20
castable: =20
[equal parts fire and ball mixed with two parts planer chips(Saw Dust) =
all by volume]
thank for interest=20
Jim
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