Inge M. Poulsen on sun 31 jan 99
Hello Jack,
One of my favorite glazes includes sodium bicarbonate.
It works wonderfully, but then I guess it depends on what you are looking =
for=21
The glaze becomes a bit =22unpredictable=22 in a predictable way=21 :) I =
colour the
glaze with iron, and it goes from matt to shiny in a way that I love, but if=
it
is because of the Sodium bicarbonate or not I don=B4t know, but maby one of =
our
helpfull glaze gurus could tell us=21 Whenn I use it inside vases it turns =
sort of
orange on the outside and almost colourless/white inside on stoneware=21
I never have problems in my glaze bucket, but you do have to mesure the =
water
out carefully, since the sodium is water soluble and therefore you can=B4t =
pour
off excess water=21
This is the base recipe I use, fired to 1260 C in oxydation :
47 China Clay
20 Ball Clay
33 Sodium bicarbonate (baking soda)
-----------
0,25 Cobber Carb.
I have no idea if this was to any help at all, but good luck anyways=21
Inge
Denmark
nr.bork.keramik=40kunst.dk
----------------------------Original message----------------------------
Has any of you had any experience with using sodium bicarbonate in glazes?
Also, I've read that soluble materials such as this will cause problems in
the glaze bucket. I understand the part about pouring off excess water will
take some of the soluble sodium with it. But what are the other problems
associated with using something like baking soda?
Thanks=21
Al Sather on tue 2 feb 99
Greetings Inge
Thank you for the following recipe. I'm not sure I would normally try this, but
development workshop. Experimentation is the word of the day. So I would like to
the water carefully but, I don't think you said how much.
Also do you place this on green ware, or bisque ware?
Thank you, Al
============
I never have problems in my glaze bucket, but you do have to measure the wa
out carefully, since the sodium is water soluble and therefore you can4t po
off excess water!
This is the base recipe I use, fired to 1260 C in oxidation :
47 China Clay
20 Ball Clay
33 Sodium bicarbonate (baking soda)
-----------
0,25 Copper Carb.
I have no idea if this was to any help at all, but good luck anyways!
--
**************************************************
*** Allan Sather (709) 895-0478 ***
*** PO Box 189, RR #1, Paradise, NF, A1L 1C1 ***
**************************************************
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