Fay & Ralph Loewenthal on sat 18 aug 01
Clayarters here is a recipe from Don Jung:
I'm taking a short break and thought I would share my experience with
this issue as I had a problem with it and had it resolved with help
through Clayart.
The kiln wash that we now use is a combination of two recipes that
originated from Clayarters. One from Tom Buck...many thanks and the
other passed down through many emails through Marilyn for Robert Tetu's
kiln wash. These recipes are as follows:
Robert Tetu's Kiln Wash:
50 gm Alumina Hydrate
25 gm EPK
25 gm Silica
Tom Buck's Kiln Wash:
Alumina hydrate 32
EPK 35
Kyanite (35 mesh) 17
Silica Sand 16
Combo Kiln Wash:
Alumina hydrate 40
EPK 30
Kyanite (35 mesh) 8
Silica 22
Robert Tetu's kiln wash is excellent; very smooth, lasts a long time and
is likely what a really good commercial kiln wash is like. Only one
problem, stays on so well that glaze drips and fine spray was tough to
remove.
Tom Buck's kiln wash is also excellent, but is very coarse and rough
with Silica Sand and Kyanite granules. This I found extremely good for
removing glaze drips and glaze 'spray' (cobalt glazes). It seemed a bit
too coarse though...so we tried a combination of the two. Well, it's
working out quite well. Holds on great but can be rubbed easily with a
silicon carbide brick to remove glaze bits. It also fills in any
irregularities and the rubbing action of the brick gets it nice and
even. Happy to say that I haven't had to chisel or grind the shelves
anymore. Haven't had any flaking or peeling, so we're just re-applying
over rubbed thin or exposed areas. By the way, don't forget to rub and
clean the underside of the shelves as dirty posts transfer bits to the
underside which in another firing will fall into some pots. Yeah, I'll
get around to cleaning the posts one day too...
Don Jung
Kensington Pottery
Vancouver BC Canada
email: dojun@axionet.com
Hope this helps kind regards Ralph in Cape Town
Ababi on sat 18 aug 01
I made by mistake, 1 kg Kaolin and 1 kg alumina hydrate\calcined . it works
good ( up to 1220 electric, did not go higher
Ababi
----- Original Message -----
From: "Fay & Ralph Loewenthal"
To:
Sent: Saturday, August 18, 2001 09:38
Subject: Kiln Wash Reci[pe
Clayarters here is a recipe from Don Jung:
I'm taking a short break and thought I would share my experience with
this issue as I had a problem with it and had it resolved with help
through Clayart.
The kiln wash that we now use is a combination of two recipes that
originated from Clayarters. One from Tom Buck...many thanks and the
other passed down through many emails through Marilyn for Robert Tetu's
kiln wash. These recipes are as follows:
Robert Tetu's Kiln Wash:
50 gm Alumina Hydrate
25 gm EPK
25 gm Silica
Tom Buck's Kiln Wash:
Alumina hydrate 32
EPK 35
Kyanite (35 mesh) 17
Silica Sand 16
Combo Kiln Wash:
Alumina hydrate 40
EPK 30
Kyanite (35 mesh) 8
Silica 22
Robert Tetu's kiln wash is excellent; very smooth, lasts a long time and
is likely what a really good commercial kiln wash is like. Only one
problem, stays on so well that glaze drips and fine spray was tough to
remove.
Tom Buck's kiln wash is also excellent, but is very coarse and rough
with Silica Sand and Kyanite granules. This I found extremely good for
removing glaze drips and glaze 'spray' (cobalt glazes). It seemed a bit
too coarse though...so we tried a combination of the two. Well, it's
working out quite well. Holds on great but can be rubbed easily with a
silicon carbide brick to remove glaze bits. It also fills in any
irregularities and the rubbing action of the brick gets it nice and
even. Happy to say that I haven't had to chisel or grind the shelves
anymore. Haven't had any flaking or peeling, so we're just re-applying
over rubbed thin or exposed areas. By the way, don't forget to rub and
clean the underside of the shelves as dirty posts transfer bits to the
underside which in another firing will fall into some pots. Yeah, I'll
get around to cleaning the posts one day too...
Don Jung
Kensington Pottery
Vancouver BC Canada
email: dojun@axionet.com
Hope this helps kind regards Ralph in Cape Town
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Ron Roy on sun 19 aug 01
I have been watching this thread for a while and have an addition.
I work at cone 10 with a porcelain body most of the time. I have found - in
the past that porcelain likes to stick to silica - any kind of silica - so
I leave silica out of my wash.
What am I using now? 20 ball and 80 Alumina hydrate - calcined would be fine.
RR
Ron Roy
RR# 4
15084 Little Lake Rd..
Brighton,
Ontario, Canada
KOK 1H0
Residence 613-475-9544
Studio 613-475-3715
Fax 613-475-3513
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