Frank Martin on mon 22 may 00
The subject of "Volcanic ash"
popped up on the list, a while back I formulated a group of glazes with
volcanic ash.
I realized few things when using Volcanic ash.
One was that it has a large mesh size, if I didn't ball mill the glaze I
could just leave out the Volcanic ash, and add the material after the wet
screening. (Some have prepared wood ash glazes this way)
Volcanic ash likes to settle in the bucket, so a little Epsom salts or
Calcium chloride will help keep it up.
Also I have found that at mid-range Oxidation Volcanic ash will sometimes
work as a replacement in a glaze that calls for Cornwall stone, although you
will always need to consider the Iron Oxide content of the volcanic ash, the
Iron will contribute a trace of color to the glaze.
++++++++++++++++++++++++++++
+++ Volcanic celadon +++
++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Reduction
Glaze type: Celadon (cal)
Color: Green
Surface: Glossy or shiny
Transparency: Transparent
Crystals: None
Bubbles: Few
Flow: Slight
Flaws: Crazes
Durability: Medium
Testing: tested good
Volcanic ash 78.4 78.3%
calcium carb 11.9 11.9%
Zinc oxide 9.8 9.8%
-------- ------
100.1 100 %
Bentonite 2.5 2.5%
Notes:
Best on Porcelain
+++++++++++++++++++++++++++++++++++++++++++
+++ FM Volcanic Celadon C12-3/7 base +++
+++++++++++++++++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Reduction
Glaze type: Celadon
Color: Green
Surface: Gloss
Transparency: Transparent
Crystals: None
Bubbles: Few
Flow: Slight
Flaws: None
Durability: Good
Testing: tested good
Date: 10/23/97
G-200 12.01 12 %
Volcanic ash 54.86 54.9%
Wollastonite 14.31 14.3%
Zinc oxide 6.81 6.8%
Flint 9.01 9 %
GROLLEG KAOLIN 3 3 %
-------- ------
100 100 %
Yellow Ocher 1 1 %
Tin oxide 1.5 1.5%
Notes:
Best on Porcelain
++++++++++++++++++++++++++++++++
+++ FM Volcanic Fake ash #1 +++
++++++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Ox. or Red.
Glaze type: Fake ash
Color: Thick green / Thin brown rust
Surface: Waxy
Transparency: Semi-opaque
Flow: Extreme
Durability: Medium
Volcanic ash 26.2 26.2%
Redart 23.7 23.7%
Kentucky OM #4 15 15 %
Whiting SnowCal 40 20 20 %
Strontium carbonate 15 15 %
-------- ------
99.9 100 %
Red iron oxide 4 4 %
++++++++++++++++++++++++++++++++++
+++ FM Volcanic Iron saturate +++
++++++++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Reduction
Glaze type: Iron saturate
Color: Brown-Black
Surface: Gloss
Transparency: Opaque
Crystals: Small
Flow: Slight
Durability: Good
Testing: used often
Date: 05/02/94
Volcanic ash 54.8 54.3%
G-200 feldspar 12 11.9%
Wollastonite 14.3 14.2%
Zinc oxide 6.8 6.7%
Grolleg clay 3 3 %
Red iron oxide 10 9.9%
-------- ------
100.9 100 %
Notes:
Best on Porcelain
++++++++++++++++++++++++++++
+++ FM Volcanic Masihco +++
++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Reduction
Glaze type: Slip glaze
Color: Brown-light
Surface: Gloss
Transparency: Opaque
Crystals: Small
Flow: Slight
Durability: Good
Testing: tested good
Date: 05/02/94
Calcined Redart 4.6 4.4%
Calcined Bentonite 42.6 40.3%
Volcanic ash 47.3 44.7%
Frit 3110 1.5 1.4%
Dolomite 0.5 0.5%
Bone ash 3.2 3 %
Yellow ochre 6 5.7%
-------- ------
105.7 100 %
Notes:
use like Masihco Slip / over a limestone glaze
---------------------------------------------
Frank Martin
92nd Street Y
Art Center
1395 Lexington Avenue,
New York, NY. 10128.
email - fmartin@92ndsty.org
email - pmartin@92ndsty.org
Call - (212) 996-1100
to register for programs.
or
Visit us on the web.
http://www.92ndsty.org/
Veena Raghavan on tue 23 may 00
Message text written by Ceramic Arts Discussion List
>The subject of "Volcanic ash"<
Hi Frank,
Great to have recipes for Volcanic ash. Thanks so much for posting
them. Apart from your suggestion that Cornwall Stone could be replaced by
Volcanic ash in mid-range glazes, do you have any recipes you would not
mind sharing for mid-range oxidation.
Thanks in advance, and I hope all is well with you and Polly Anne.
All the best.
Veena
Veena Raghavan
75124.2520@compuserve.com
Donald Burroughs on tue 23 may 00
Dear Frank
Has the formula for the FM volcanic celadon been altered to a lower
temp.? In the title does the c12-3/7 indicate that this formula was
originally a cone 12 glaze? If so would you please reply to me to verify.I
fire to cone 12-13 in a wood kiln and would like to use this formula.
Sincerely,Donald Burroughs
donaldo@autobahn.mb.ca
The Vessel Online @ http://www.autobahn.mb.ca/~donaldo
-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG]On
Behalf Of Frank Martin
Sent: May 22, 2000 3:58 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Subject: Volcanic ash - Glazes
The subject of "Volcanic ash"
popped up on the list, a while back I formulated a group of glazes with
volcanic ash.
I realized few things when using Volcanic ash.
One was that it has a large mesh size, if I didn't ball mill the glaze I
could just leave out the Volcanic ash, and add the material after the wet
screening. (Some have prepared wood ash glazes this way)
Volcanic ash likes to settle in the bucket, so a little Epsom salts or
Calcium chloride will help keep it up.
Also I have found that at mid-range Oxidation Volcanic ash will sometimes
work as a replacement in a glaze that calls for Cornwall stone, although you
will always need to consider the Iron Oxide content of the volcanic ash, the
Iron will contribute a trace of color to the glaze.
++++++++++++++++++++++++++++
+++ Volcanic celadon +++
++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Reduction
Glaze type: Celadon (cal)
Color: Green
Surface: Glossy or shiny
Transparency: Transparent
Crystals: None
Bubbles: Few
Flow: Slight
Flaws: Crazes
Durability: Medium
Testing: tested good
Volcanic ash 78.4 78.3%
calcium carb 11.9 11.9%
Zinc oxide 9.8 9.8%
-------- ------
100.1 100 %
Bentonite 2.5 2.5%
Notes:
Best on Porcelain
+++++++++++++++++++++++++++++++++++++++++++
+++ FM Volcanic Celadon C12-3/7 base +++
+++++++++++++++++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Reduction
Glaze type: Celadon
Color: Green
Surface: Gloss
Transparency: Transparent
Crystals: None
Bubbles: Few
Flow: Slight
Flaws: None
Durability: Good
Testing: tested good
Date: 10/23/97
G-200 12.01 12 %
Volcanic ash 54.86 54.9%
Wollastonite 14.31 14.3%
Zinc oxide 6.81 6.8%
Flint 9.01 9 %
GROLLEG KAOLIN 3 3 %
-------- ------
100 100 %
Yellow Ocher 1 1 %
Tin oxide 1.5 1.5%
Notes:
Best on Porcelain
++++++++++++++++++++++++++++++++
+++ FM Volcanic Fake ash #1 +++
++++++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Ox. or Red.
Glaze type: Fake ash
Color: Thick green / Thin brown rust
Surface: Waxy
Transparency: Semi-opaque
Flow: Extreme
Durability: Medium
Volcanic ash 26.2 26.2%
Redart 23.7 23.7%
Kentucky OM #4 15 15 %
Whiting SnowCal 40 20 20 %
Strontium carbonate 15 15 %
-------- ------
99.9 100 %
Red iron oxide 4 4 %
++++++++++++++++++++++++++++++++++
+++ FM Volcanic Iron saturate +++
++++++++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Reduction
Glaze type: Iron saturate
Color: Brown-Black
Surface: Gloss
Transparency: Opaque
Crystals: Small
Flow: Slight
Durability: Good
Testing: used often
Date: 05/02/94
Volcanic ash 54.8 54.3%
G-200 feldspar 12 11.9%
Wollastonite 14.3 14.2%
Zinc oxide 6.8 6.7%
Grolleg clay 3 3 %
Red iron oxide 10 9.9%
-------- ------
100.9 100 %
Notes:
Best on Porcelain
++++++++++++++++++++++++++++
+++ FM Volcanic Masihco +++
++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Reduction
Glaze type: Slip glaze
Color: Brown-light
Surface: Gloss
Transparency: Opaque
Crystals: Small
Flow: Slight
Durability: Good
Testing: tested good
Date: 05/02/94
Calcined Redart 4.6 4.4%
Calcined Bentonite 42.6 40.3%
Volcanic ash 47.3 44.7%
Frit 3110 1.5 1.4%
Dolomite 0.5 0.5%
Bone ash 3.2 3 %
Yellow ochre 6 5.7%
-------- ------
105.7 100 %
Notes:
use like Masihco Slip / over a limestone glaze
---------------------------------------------
Frank Martin
92nd Street Y
Art Center
1395 Lexington Avenue,
New York, NY. 10128.
email - fmartin@92ndsty.org
email - pmartin@92ndsty.org
Call - (212) 996-1100
to register for programs.
or
Visit us on the web.
http://www.92ndsty.org/
____________________________________________________________________________
__
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Frank Martin on fri 26 may 00
Dear Donald
The FM volcanic celadon hasn't been altered to a lower
temperature.
The C12-3/7 refers to Celadon test #12 that was
part of a 30-70 line blend.
This should work fine in the wood kiln.
When I was firing it last at cone 11 touching in a gas kiln.
And it was also fired in the wood/salt kiln at Peters Valley,
and it worked fine.
C12-3/7 is a very shiny celadon that almost looks like cross between
V and O celadon, and Sander's celadon.
+++++++++++++++++++++++
+++ V&O Celadon +++
+++++++++++++++++++++++
Range: c/9-11
Firing type: Reduction
Color: Green
Surface: Gloss
Date: 10/23/97
Kona F-4 27.51 27.5%
Whiting 19.63 19.6%
Flint 32.92 32.9%
EPK 19.94 19.9%
-------- ------
100 100 %
Red iron oxide 1.94 1.9%
++++++++++++++++++++++++++++
+++ Sander's celadon +++
++++++++++++++++++++++++++++
Range: c/9-11
Firing type: Reduction
Glaze type: Celadon (cal)
Surface: Gloss
Transparency: Clear/Transparent
Source: sander's book
Date: 11/21/98
Kona F-4 feldspar 44 41.9%
Whiting 18 17.1%
Kaolin 10 9.5%
Flint 28 26.7%
Barnard clay 3 2.9%
Bentonite 2 1.9%
-------- ------
105 100 %
Variations:
Green: barnard 5%
``````````````````````````````````````````````````````````
C12-3/7 has never crazed on this clay body
below.
++++++++++++++++++++++++++++++++++++++
+++ Martin White Stoneware / wcc +++
++++++++++++++++++++++++++++++++++++++
Range: c/9-12
Glaze type: Clay (White Stoneware)
Date: 07/02/98
Tile #6 kaolin 19 19 %
GROLLEG KAOLIN 10 10 %
Flint 19 19 %
G-200 feldspar 24 24 %
Kentucky OM #4 28 28 %
-------- ------
100 100 %
-----Original Message-----
Date: Tue, 23 May 2000 10:58:55 -0500
From: Donald Burroughs
Subject: Re: Subject: Volcanic ash - Glazes
Dear Frank
Has the formula for the FM volcanic celadon been altered to a lower
temp.? In the title does the c12-3/7 indicate that this formula was
originally a cone 12 glaze? If so would you please reply to me to
verify.I
fire to cone 12-13 in a wood kiln and would like to use this formula.
Sincerely,Donald Burroughs
donaldo@autobahn.mb.ca
The Vessel Online @ http://www.autobahn.mb.ca/~donaldo
-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG]On
Behalf Of Frank Martin
Sent: May 22, 2000 3:58 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Subject: Volcanic ash - Glazes
The subject of "Volcanic ash"
popped up on the list, a while back I formulated a group of glazes with
volcanic ash.
I realized few things when using Volcanic ash.
One was that it has a large mesh size, if I didn't ball mill the glaze
I
could just leave out the Volcanic ash, and add the material after the
wet
screening. (Some have prepared wood ash glazes this way)
Volcanic ash likes to settle in the bucket, so a little Epsom salts or
Calcium chloride will help keep it up.
Also I have found that at mid-range Oxidation Volcanic ash will
sometimes
work as a replacement in a glaze that calls for Cornwall stone, although
you
will always need to consider the Iron Oxide content of the volcanic ash,
the
Iron will contribute a trace of color to the glaze.
++++++++++++++++++++++++++++
+++ Volcanic celadon +++
++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Reduction
Glaze type: Celadon (cal)
Color: Green
Surface: Glossy or shiny
Transparency: Transparent
Crystals: None
Bubbles: Few
Flow: Slight
Flaws: Crazes
Durability: Medium
Testing: tested good
Volcanic ash 78.4 78.3%
calcium carb 11.9 11.9%
Zinc oxide 9.8 9.8%
-------- ------
100.1 100 %
Bentonite 2.5 2.5%
Notes:
Best on Porcelain
+++++++++++++++++++++++++++++++++++++++++++
+++ FM Volcanic Celadon C12-3/7 base +++
+++++++++++++++++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Reduction
Glaze type: Celadon
Color: Green
Surface: Gloss
Transparency: Transparent
Crystals: None
Bubbles: Few
Flow: Slight
Flaws: None
Durability: Good
Testing: tested good
Date: 10/23/97
G-200 12.01 12 %
Volcanic ash 54.86 54.9%
Wollastonite 14.31 14.3%
Zinc oxide 6.81 6.8%
Flint 9.01 9 %
GROLLEG KAOLIN 3 3 %
-------- ------
100 100 %
Yellow Ocher 1 1 %
Tin oxide 1.5 1.5%
Notes:
Best on Porcelain
++++++++++++++++++++++++++++++++
+++ FM Volcanic Fake ash #1 +++
++++++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Ox. or Red.
Glaze type: Fake ash
Color: Thick green / Thin brown rust
Surface: Waxy
Transparency: Semi-opaque
Flow: Extreme
Durability: Medium
Volcanic ash 26.2 26.2%
Redart 23.7 23.7%
Kentucky OM #4 15 15 %
Whiting SnowCal 40 20 20 %
Strontium carbonate 15 15 %
-------- ------
99.9 100 %
Red iron oxide 4 4 %
++++++++++++++++++++++++++++++++++
+++ FM Volcanic Iron saturate +++
++++++++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Reduction
Glaze type: Iron saturate
Color: Brown-Black
Surface: Gloss
Transparency: Opaque
Crystals: Small
Flow: Slight
Durability: Good
Testing: used often
Date: 05/02/94
Volcanic ash 54.8 54.3%
G-200 feldspar 12 11.9%
Wollastonite 14.3 14.2%
Zinc oxide 6.8 6.7%
Grolleg clay 3 3 %
Red iron oxide 10 9.9%
-------- ------
100.9 100 %
Notes:
Best on Porcelain
++++++++++++++++++++++++++++
+++ FM Volcanic Masihco +++
++++++++++++++++++++++++++++
Range: c/9-10
Firing type: Reduction
Glaze type: Slip glaze
Color: Brown-light
Surface: Gloss
Transparency: Opaque
Crystals: Small
Flow: Slight
Durability: Good
Testing: tested good
Date: 05/02/94
Calcined Redart 4.6 4.4%
Calcined Bentonite 42.6 40.3%
Volcanic ash 47.3 44.7%
Frit 3110 1.5 1.4%
Dolomite 0.5 0.5%
Bone ash 3.2 3 %
Yellow ochre 6 5.7%
-------- ------
105.7 100 %
Notes:
use like Masihco Slip / over a limestone glaze
---------------------------------------------
Frank Martin
92nd Street Y
Art Center
1395 Lexington Avenue,
New York, NY. 10128.
email - fmartin@92ndsty.org
email - pmartin@92ndsty.org
Call - (212) 996-1100
to register for programs.
or
Visit us on the web.
http://www.92ndsty.org/
____________________________________________________________________________
__
| |
|
