Snail Scott on wed 25 jun 03
At 08:53 PM 6/25/03 -0400, you wrote:
>I am out of Alumina hydrate but I have a bag of Alumina. Can I substitute
Alumina for Allumina hydrate?
It's unlikely that it's actually 'alumina'. It might be
either alumina hydrate or alumina oxide. (Many studios
stock only one or the other, and label them 'alumina'
as a shorthand, assuming that the full identity is
understood.) Either will work for kiln wash, though since
alumina oxide is generally more expensive for the amount
of alumina it provides, it might not be the best for
regular use. Alumina oxide has more alumina for its
weight than alumina hydrate (no water in the molecule),
so if that's what it is for sure, use less. Otherwise,
don't sweat it. There are a wide variety of kilnwash
recipes out there, and the proportions aren't really
critical unless you're doing salt-firing or some such.
-Snail
Bruce on Earthlink on wed 25 jun 03
I am out of kiln was and need to mix some more. My long standing recipe =
is 50% Alumina hydrate and 50% Flint.
I am out of Alumina hydrate but I have a bag of Alumina. Can I =
substitute Alumina for Allumina hydrate?
Bruce Michaels
Roger Korn on thu 26 jun 03
Bruce,
The only difference is that 'Alumina' is calcined 'Alumina Hydrate',
that is, it doesn't have the chemically bound water molecules. Should
work just fine. To be exact, change the formula to 60% silica (flint),
40% alumina - doubt that it makes much difference.
Hope this helps,
Roger
Bruce on Earthlink wrote:
>I am out of kiln was and need to mix some more. My long standing recipe is 50% Alumina hydrate and 50% Flint.
>
>I am out of Alumina hydrate but I have a bag of Alumina. Can I substitute Alumina for Allumina hydrate?
>
>Bruce Michaels
>
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
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>
--
Roger Korn
McKay Creek Ceramics
In AZ: PO Box 463
4215 Culpepper Ranch Rd
Rimrock, AZ 86335
928-567-5699 <-
In OR: PO Box 436
31330 NW Pacific Ave.
North Plains, OR 97133
503-647-5464
Kenneth D. Westfall on thu 26 jun 03
If your not salt firing then 3 parts flint to 1 part kaolin works fine a
kiln wash. 4 part flint to 1 kaolin makes a good wad clay. A lot cheaper
to make then using alumina hydrate.
At 08:53 PM 06/25/2003 -0400, you wrote:
>I am out of kiln was and need to mix some more. My long standing recipe =
>is 50% Alumina hydrate and 50% Flint.
>
>I am out of Alumina hydrate but I have a bag of Alumina. Can I =
>substitute Alumina for Allumina hydrate?
>
>Bruce Michaels
>
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
>
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>
>Moderator of the list is Mel Jacobson who may be reached at
>melpots@pclink.com.
Kenneth D. Westfall
Pine Hill Pottery
R.D. #2 Box 6AA
Harrisville, WV 26362
pinehill@ruralnet.org
http://www.pinehillpottery.com
Zoe Paddy Johnson on sat 28 jun 03
Or glass!
--On Saturday, June 28, 2003 12:17 PM -0500 Ron Roy
wrote:
> Not so if you are firing porcelain!
>
>> If your not salt firing then 3 parts flint to 1 part kaolin works fine a
>> kiln wash.
>
> Ron Roy
> RR#4
> 15084 Little Lake Road
> Brighton, Ontario
> Canada
> K0K 1H0
> Phone: 613-475-9544
> Fax: 613-475-3513
>
> _________________________________________________________________________
> _____ Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
Ron Roy on sat 28 jun 03
Not so if you are firing porcelain!
>If your not salt firing then 3 parts flint to 1 part kaolin works fine a
>kiln wash.
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
Ron Roy on mon 30 jun 03
I use mixtures of ball clay, EPK and alumina hydrate - what really maters
is how well it stays on the shelf.
Try 20 Ball, 20 EPK and 60 alumina hydrate - I spray it on with one of
those one quartl pump up plant misters - splatter is better than a fine
mist.
I don't think it is so crucial for cone 6 by the way but if you find part
of your foot rims stuck to the shelf - the problem is the silica in the
wash.
RR
>zoe and ron,
>so, what do you recommend for porcelain or glass?
>(assuming the original question was for kiln wash recipe.)
>(i use 50:50.)
>terry
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
terryh on mon 30 jun 03
zoe and ron,
so, what do you recommend for porcelain or glass?
(assuming the original question was for kiln wash recipe.)
(i use 50:50.)
terry
terry hagiwara
terryh@pdq.net
http://www.geocities.com/terry.hagiwara
-----------------------------
Date: Sat, 28 Jun 2003 20:58:50 -0600
From: Zoe Paddy Johnson
Subject: Re: A question about kilnwash
Or glass!
--On Saturday, June 28, 2003 12:17 PM -0500 Ron Roy
wrote:
> Not so if you are firing porcelain!
>
>> If your not salt firing then 3 parts flint to 1 part kaolin works fine a
>> kiln wash.
>
> Ron Roy
> RR#4
> 15084 Little Lake Road
> Brighton, Ontario
> Canada
> K0K 1H0
> Phone: 613-475-9544
> Fax: 613-475-3513
>
terry hagiwara
terryh@pdq.net
http://www.geocities.com/terry.hagiwara
Zoe Paddy Johnson on mon 30 jun 03
I use 60% alumina hydrate and 40% epk (by volume). It is critically
important for glass to thoroughly clean each shelf and replace with a new
coat of kiln wash. I use either 3 thin brushed coats, or I mix the kiln
wash 50-50 and apply it as a thick slip with my fingers to get texture in
the glass.
ZoeJ
--On Monday, June 30, 2003 12:09 AM -0700 terryh wrote:
> zoe and ron,
> so, what do you recommend for porcelain or glass?
> (assuming the original question was for kiln wash recipe.)
> (i use 50:50.)
> terry
>
> terry hagiwara
> terryh@pdq.net
> http://www.geocities.com/terry.hagiwara
> ------------------------------
>
> Date: Sat, 28 Jun 2003 20:58:50 -0600
> From: Zoe Paddy Johnson
> Subject: Re: A question about kilnwash
>
> Or glass!
>
> --On Saturday, June 28, 2003 12:17 PM -0500 Ron Roy
> wrote:
>
>> Not so if you are firing porcelain!
>>
>>> If your not salt firing then 3 parts flint to 1 part kaolin works fine a
>>> kiln wash.
>>
>> Ron Roy
>> RR#4
>> 15084 Little Lake Road
>> Brighton, Ontario
>> Canada
>> K0K 1H0
>> Phone: 613-475-9544
>> Fax: 613-475-3513
>>
>
> terry hagiwara
> terryh@pdq.net
> http://www.geocities.com/terry.hagiwara
>
> _________________________________________________________________________
> _____ Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
> melpots@pclink.com.
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