Gary Ferguson on mon 29 mar 04
I have found several Raku Glazes look/act differently after they are mixed
for a period of time. It's probably due to the GB. Now I dry mix a large
batch of glaze and then just mix what I'm planning to use at one time with
water. The results are a little more constant for me this way.
Gary Ferguson
Raku Clay Artist
Nampa, ID 83687
Raku Gallery at: http://www.garyrferguson.com
300+ Glaze Collection at: http://www.rakuglazes.com
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----- Original Message -----
From: "Gene Arnold"
To:
Sent: Monday, March 29, 2004 3:18 PM
Subject: glaze gone bad
Is it possible or probable that a glaze can go bad???
I started doing some raku today (white crackle) and my old reliable 80/20
glaze started doing some crazy things. I got runs, thick and thin areas on
the pieces and not very good crackle at all.
This is the first time I've used this batch of glaze in about a year.
For those not familiar with the 80/20 it is
80 gertsley borate
28 nep sy
1 tin oxide
Gene & Latonna
mudduck@mudduckpottery.com
www.mudduckpottery.com
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Gene Arnold on mon 29 mar 04
Is it possible or probable that a glaze can go bad???
I started doing some raku today (white crackle) and my old reliable =
80/20 glaze started doing some crazy things. I got runs, thick and thin =
areas on the pieces and not very good crackle at all.
This is the first time I've used this batch of glaze in about a year.
For those not familiar with the 80/20 it is=20
80 gertsley borate
28 nep sy
1 tin oxide
Gene & Latonna
mudduck@mudduckpottery.com
www.mudduckpottery.com
L. P. Skeen on mon 29 mar 04
Gene, the Gerstley is prolly your culprit. It's soluble in water, and then
when the water evaporates it takes your GB with it. :(
----- Original Message -----
From: "Gene Arnold"
Is it possible or probable that a glaze can go bad???
This is the first time I've used this batch of glaze in about a year.
For those not familiar with the 80/20 it is
80 gertsley borate
28 nep sy
Hendrix, Taylor J. on mon 29 mar 04
Hehe dallin'. No, no, no. GB doesn't evaporate even if it's close
friends, H, two, and O do. I bet any soluable ions could be causing
defloc/floc (I'm too tired to get this straight in my head right now)
problems, causing the 'thinning' problem.
Taylor, in Waco
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of L. P. Skeen
Sent: Monday, March 29, 2004 7:10 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: glaze gone bad
Gene, the Gerstley is prolly your culprit. It's soluble in water, and
then
when the water evaporates it takes your GB with it. :(
...
william schran on tue 30 mar 04
Gene wrote>Is it possible or probable that a glaze can go bad???
I started doing some raku today (white crackle) and my old reliable
80/20 glaze started doing some crazy things. I got runs, thick and
thin areas on the pieces and not very good crackle at all.
This is the first time I've used this batch of glaze in about a year.<
The clue here is the last statement - not using this glaze in a year.
Both the gertsley and neph. sy. are partially soluble, so after a
year one would expect problems.
May want to mix the glaze dry and only mix with water what you'll use
in the short term.
Bill
Wesley Derrick - Derrick Pottery - Jackson, MS on tue 30 mar 04
I've used the following glaze with GB in in and kept it for several years
with no apparent problem using it later...great crackle too (the best I've
accomplished so far....)
you can see it in use here...
http://img5.photobucket.com/albums/v15/DerrickPottery/RAKU%
2001/03240401_a.jpg
If you haven't tried it ....I'd give it a go...it's been a pretty durable
glaze with a mighty long shelf life for me so far..
Hope this helps out.
Wesley
===================================================
Glaze name: Piepenburg White
Firing: Raku
Color: White
Date: 05/13/98
Recipe: (Percent, Batch)
Gerstley borate 70.00 70.00
Cornwall Stone 15.00 15.00
Tin oxide 10.00 10.00
Flint 5.00 5.00
-------- --------
Totals: 100.00 100.00
===================================================
Ron Roy on thu 1 apr 04
Strange how some people have the problem and other do not - it might be
your local water - it could be useful to try DI water from you local water
conditioner company or even distilled.
RR
>I've used the following glaze with GB in in and kept it for several years
>with no apparent problem using it later...great crackle too (the best I've
>accomplished so far....)
>you can see it in use here...
>http://img5.photobucket.com/albums/v15/DerrickPottery/RAKU%
>2001/03240401_a.jpg
>
>If you haven't tried it ....I'd give it a go...it's been a pretty durable
>glaze with a mighty long shelf life for me so far..
>Hope this helps out.
>
>Wesley
>===================================================
>Glaze name: Piepenburg White
>
>Firing: Raku
>Color: White
>Date: 05/13/98
>
>Recipe: (Percent, Batch)
>
>Gerstley borate 70.00
>
>Cornwall Stone 15.00
>
>Tin oxide 10.00
>
>
>Flint 5.00
--------
>Totals: 100.00
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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