Tommy Humphries on thu 16 may 02
Best big bead holder is a burned out thermocouple probe...good n heavy duty
to hold up any sized beads you might want.
Tommy
Pam Pasko on thu 16 may 02
I am going to be firing 30 large bead shapes that are one to three inches in
size with a 1/2 inch round hole in the middle of each. For the bisque firing
I can sit them onto the shelf. I need to glaze all around them except for
the inside hole in the middle. I am thinking of making a cone shape out of
the same claybody to sit each onto for the glaze fire.(sort of like the
wadding for tiles ect...) Does it matter if the clay is wet, or dry??? I am
working on a deadline and running out of time.
Thanks!
Pam
Donald G. Goldsobel on thu 16 may 02
Pam Try making abead holder out of nichrome (sp?) wire. It will withstand
the heat and allow the bead to be suspended horizontally with the wire
through the middle.
Donald
----- Original Message -----
From: "Pam Pasko"
To:
Sent: Thursday, May 16, 2002 2:11 PM
Subject: Question on firing large bead shapes??
> I am going to be firing 30 large bead shapes that are one to three inches
in size with a 1/2 inch round hole in the middle of each. For the bisque
firing I can sit them onto the shelf. I need to glaze all around them
except for the inside hole in the middle. I am thinking of making a cone
shape out of the same claybody to sit each onto for the glaze fire.(sort of
like the wadding for tiles ect...) Does it matter if the clay is wet, or
dry??? I am working on a deadline and running out of time.
> Thanks!
> Pam
>
>
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Alisa Liskin Clausen on fri 17 may 02
Dear Pam,
The first two things that give me a red light are
the clay trees that you will put the large beads on should be dry, because
if you are firing a glaze and the temp. goes up rapidly to even 100c, the
trees will likely explode,assuming that they are thicker than a thumb. I
did small experiments in my oven with cone packs, and totally wet clay blew
up before 100c. Also, because they will be covered by the bead, there is
even less air ciruculating and less room for steam to leave. I would let
them dry slowly with a warm air blower or even in your oven, if you are
pressed for time. You could model up 20 trees that look like finger ring
holders, narrow at the top, getting thicker to the bottom, with a broad base
for stability. You could crash dry them in the oven at 50c over an hour or
two, then up to 100c for an hour and then up to 150c and finally to 200c for
another hour. It is along time to heat your oven, but smaller and less
energy probably than doing it in your kiln.
Second red light is that you are certain of the glaze and application you
are using on the beads. If there is the slightest risk of running, I would
not stand the beads up on vertical holders. You could make the same trees,
but use high fire wire (Kantral?) inbetween. A bigger, sturdier version of
regular bead trees. Hang the beads up like wash on a line, with the wire
going horizontally through the beads.
good luck and regards from Alisa in Denmark
Roger Graham on fri 17 may 02
This one is for Pam Paska, asking for ideas about supporting large bead
shapes while they're being glazed. How about threading the beads (with their
1/2 inch holes) onto a length of silica tubing, supported at each end on a
short shelf prop?
Here (Australia) many kinds of electric "radiator" room heaters have a coil
of nichrome wire enclosed safely inside a translucent hollow tube, looking
rather like milky-white glass. Diameter varies, but mostly 5/16 inch or 3/8
inch.The tubing of course is made of silica, and remains rigid all the way
up to white heat. I've salvaged umpteen lengths of this from discarded
radiators at the recycling area of our local garbage tip (is that a "trash
dump" in US?). Used in my own case for suspending Kanthal wire elements
from the roof of a glass-forming kiln. Wonderful stuff. Can be heated red
hot and plunged into cold water without cracking. You can even close off one
end of a piece of tube with an oxy-welding flame to make a home-brewed
sheath for a pyrometer probe. Worth a try for suspending all those beads.
Roger Graham http://members.optusnet.com.au/~rogergraham
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