Kurt Wild on sun 4 jun 00
Jens Gruhlke wrote:
>
> Hey, what is the best way to make raku waterproof ???
I once heard someone say that some Japanese dipped their raku pieces in
Tung oil to wateerproof them. I have used Tung oil (not Tung oil
varnish) on blackware pieces to protect them from moisture but have
never really tested how waterproof Tung oil makes them. I do know that
the Tung oil does not change the surface quality of my treated
blackware.
--
Kurt Wild
1000 E. Cascade Ave.
River Falls, WI 54022
Phone: 715-425-5715
email: KURT.L.WILD@UWRF.EDU
web site: http://wwwpp.uwrf.edu/~kw77/
Khaimraj Seepersad on sun 4 jun 00
Good Day to All ,
Katharina ,
I don't know if this helps , but here goes -
Years ago , in Australia , a young lady was doing research on
a body made with petalite and other ingredients able to
withstand thermal shock [ naked flame or electric on the stove ] .
Kettles for the stove .
She did succeed , perhaps you could find the article , or maybe
someone will remember it .
The magazine is out of Australia , 4 times a year , I cannot
presently find the title .
Anyhow , if you mastered the body , maybe a shock resistant
body with a raku glaze could result . Naturally waterproof and a
new type of raku ?
Khaimraj
-----Original Message-----
From: Jens Gruhlke
To: CLAYART@LSV.CERAMICS.ORG
Date: 04 June 2000 11:39
Subject: Raku-waterproof
Hey, what is the best way to make raku waterproof ???
Greetings from Katharina
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Marvpots@AOL.COM on sun 4 jun 00
Hi:
Try rinsing with Thompson's Water Sealer; just pour it into the pot, flush
it around a few times and pour it out. After drying, pot should be water
proof.
Good luck!
Marvin Flowerman
marvpots@aol.com
Jens Gruhlke on sun 4 jun 00
Hey, what is the best way to make raku waterproof ???
Greetings from Katharina
Tim Havens on mon 5 jun 00
The way to make a waterproof raku pot is - this is tedious but bullet
proof I'll warn you right now , but I found it to be the only way ;
really. Get ready for this laugh cause I really did this - - - vacuum
impregnation with a heat set resin .A very dirty nasty job . Raku won't
hold water or color ; just foo fooo and a lot of fun .
alohaz Tim
Jean Todd on tue 6 jun 00
The magazine is called Pottery in Australia, and the article is in Autumn
1977, Vol. 16, No. 1.
Titled Flameproof Pottery by Stephen Anderson and the mix he used for a body
was Petalite 52%, Ball Clay "QA" (Axedale Clay) 45% and Broken Hill
Feldspar 3%.
The petalite was crushed and milled to pass through an 80# sieve. What he
was looking for was a pot he could use on a gas stove, and electric
hotplates.It is quite a long article and very informative.
Jean
"Lang may your lum reek"
E-mail mallyree@ix.net.au
> Years ago , in Australia , a young lady was doing research on
> a body made with petalite and other ingredients able to
> withstand thermal shock [ naked flame or electric on the stove ] .
> Kettles for the stove .
> She did succeed , perhaps you could find the article , or maybe
> someone will remember it .
>
> The magazine is out of Australia , 4 times a year , I cannot
> presently find the title .
Michael Banks on tue 6 jun 00
Hi Khaimraj,
The magazine article was "Developing a Flameproof Body" by Penny Barrett in
the Autumn 1993 (Vol 32, No1) edition of Pottery in Australia (page 23-27).
Michael,
in NZ
Khaimraj Seepersad wrote:
----- Original Message -----
> Katharina ,
>
> I don't know if this helps , but here goes -
>
> Years ago , in Australia , a young lady was doing research on
> a body made with petalite and other ingredients able to
> withstand thermal shock [ naked flame or electric on the stove ] .
> Kettles for the stove .
> She did succeed , perhaps you could find the article , or maybe
> someone will remember it .
>
> The magazine is out of Australia , 4 times a year , I cannot
> presently find the title .
>
> Anyhow , if you mastered the body , maybe a shock resistant
> body with a raku glaze could result . Naturally waterproof and a
> new type of raku ?
> Khaimraj
iandol on wed 7 jun 00
Snip----Get ready for this laugh cause I really did this - - - vacuum =
impregnation with a heat set resin. A very dirty nasty job.
Tim, I regard this as a serious proposition. Could be turned into a =
lucrative cottage industry. After all, the wood turning brigade have =
been doing something similar for a couple of decades. But they make a =
meal of it and stain resins which are used to fill shakes and shivers in =
turned items with contrasting colours, bright reds and oranges. =
Impressive results.
Ivor. In south oz on a grey day when it might rain but hasn=92t=20
Michael Banks on thu 8 jun 00
There has been a lot of development of spodumene, petalite and eucryptite
flameproof ware over the years in industry. These compositions can have
very low, zero, or even negative coefficients of thermal expansion (CTE).
It is a thoroughly investigated field. Commercial domesticware has been
produced, particularly in Scandinavia, but onerous product liability issues
deter most people doing it. These bodies make excellent Raku, but the
ingredients are fairly expensive.
I designed a Raku body that was based on lepidolite, but cost/availability
issues forced a return to non-lithium minerals in the end.
Michael
Khaimraj Seepersad wrote:
----- Original Message -----
> was there any other development with that body ? I always
> wondered if this was the next step for raku ?
>
> Sort of a high fire body with lowfire crackle glazes .
> I wonder if anyone on Clayart would be curious enough to do
> this ?
> Khaimraj
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