Paul Raymond on tue 31 aug 04
Hi there everyone,
I've had a busy summer. Decided to go back to school so I was preparing
for that and classes started yesterday. I haven't been doing a lot of
ceramics but getting geared up for another go at it. I am looking for
information, preferably websites that can aid me in my search.
Specifically, what colorants do what at cone 6, oxidation. Any help
would be greatly appreciated. Thanks.
Paul Raymond
Franklin, Tennessee
crazyrays@bellsouth.net
Tig Dupre on wed 1 sep 04
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Specifically, what colorants do what at cone 6, oxidation. Any help
would be greatly appreciated. Thanks.
-------------------------------------<>------------------------------
Paul,
You're looking at a lo-o-o-o-ong study, if you do it right. The reactions of a number of colorants depend greatly on the base glaze and the combination of colorants. Just a study of combinations of copper, cobalt, iron, and titanium will yield varying results on different clay bodies, in different combinations.
I suggest you get Michael Bailey's "Cone Six Glazes," Robin Hopper's "Ceramic Spectrum," and Chappel's book on clay and glazes, and sit down with a pencil and paper and work out a series of experiments. Make test pots or tiles from white stoneware, red stoneware, and gray stoneware. Mark them carefully, mix glaze bases, and add colorants.
One experiment I did was to make a grid:
copper/iron (%)
|1/1 |2/1 |3/1 |4/1 |
|2/2 |3/2 |4/2 |1/2 |
|3/3 |4/3 |1/3 |2/3 |
|4/4 |1/4 |2/4 |3/4 |
Add these percentages of colorants to a successful glaze base, glaze your tiles and record the results. Try the same with nickle, titanium (oxide or rutile), chrome, manganese (careful!), cobalt, and other colorants. I am mentioning the pure metals only for reference. We get them as carbonates or oxides, sulphides, sulphates, tetrahydroxides, metaphosphates, and other compounds. I suggest starting with carbonates and oxides. Oxides are stronger colorants than carbonates and require less amounts in a glaze for the same intensity.
Your results, using *your* materials, *your* kiln, *your* water, and *your* weather *WILL* vary.
Welcome to wild and wacky world of glazes! It's a wonderful ride, full of surprises.
Tig Dupre
in Port Orchard, Washington, USA
Donna Nicosia on wed 1 sep 04
BAILEYS' " CONE 6 GLAZES " BOOK IS EXCELLENT, I'VE GOTTEN QUITE A FEW
NICE GLAZES FROM IT. GOOD LUCK, DONNA
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Tig Dupre
Sent: Wednesday, September 01, 2004 10:55 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Looking for websites that deal with colorants at cone 6, ox
-------------------------------------<>---------------------------
---
Specifically, what colorants do what at cone 6, oxidation. Any help
would be greatly appreciated. Thanks.
-------------------------------------<>---------------------------
---
Paul,
You're looking at a lo-o-o-o-ong study, if you do it right. The
reactions of a number of colorants depend greatly on the base glaze and
the combination of colorants. Just a study of combinations of copper,
cobalt, iron, and titanium will yield varying results on different clay
bodies, in different combinations.
I suggest you get Michael Bailey's "Cone Six Glazes," Robin Hopper's
"Ceramic Spectrum," and Chappel's book on clay and glazes, and sit down
with a pencil and paper and work out a series of experiments. Make test
pots or tiles from white stoneware, red stoneware, and gray stoneware.
Mark them carefully, mix glaze bases, and add colorants.
One experiment I did was to make a grid:
copper/iron (%)
|1/1 |2/1 |3/1 |4/1 |
|2/2 |3/2 |4/2 |1/2 |
|3/3 |4/3 |1/3 |2/3 |
|4/4 |1/4 |2/4 |3/4 |
Add these percentages of colorants to a successful glaze base, glaze
your tiles and record the results. Try the same with nickle, titanium
(oxide or rutile), chrome, manganese (careful!), cobalt, and other
colorants. I am mentioning the pure metals only for reference. We get
them as carbonates or oxides, sulphides, sulphates, tetrahydroxides,
metaphosphates, and other compounds. I suggest starting with carbonates
and oxides. Oxides are stronger colorants than carbonates and require
less amounts in a glaze for the same intensity.
Your results, using *your* materials, *your* kiln, *your* water, and
*your* weather *WILL* vary.
Welcome to wild and wacky world of glazes! It's a wonderful ride, full
of surprises.
Tig Dupre
in Port Orchard, Washington, USA
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