John Weber on wed 22 jan 97
I recently downloaded GlazeChem glaze calculation software and love it.
However, I
use several Hardwood (Fireplace) Ash glazes and the software has no formula
for
Hardwood Ash. I realize Hardwood Ash is going to always be different but I
would appreciate anyone who has a formula for a "theoretical" formula for
Hardwood Ash that could be used in the GlazeChem software so I can get at
least an approximate analysis. Thanks.
Dave and Pat Eitel on thu 23 jan 97
>----------------------------Original message----------------------------
>I recently downloaded GlazeChem glaze calculation software and love it.
> However, I
>use several Hardwood (Fireplace) Ash glazes and the software has no formula
>for
>Hardwood Ash. I realize Hardwood Ash is going to always be different but I
>would appreciate anyone who has a formula for a "theoretical" formula for
>Hardwood Ash that could be used in the GlazeChem software so I can get at
>least an approximate analysis. Thanks.
The World of Japanese Ceramics by Herbert Sanders, pp. 232-33 lists this
formula for common ash: SiO2 30.99, phosphoric acid 1.91, Al2 O3 8.91, iron
oxide 3.04, CaO 22.42, MgO 3.3, K2o 3.91,Na2O2.33, MnO1.26, and lost on
ignition, 21.44
Later...Dave
Dave Eitel
Cedar Creek Pottery
Cedarburg, WI
pots@cedarcreekpottery.com
http://www.cedarcreekpottery.com
Iain Begg on thu 23 jan 97
John
Phil Roger's "Ash Glazes" book gives analyses
for various hard and soft woods. There may also be
some stuff on the Clayart archives and in the
CeramicsWeb materials DB.
Iain
Iain begg begg@mpr.ca
Bearsden Studio, Vancouver, BC
----------
From: Ceramic Arts Discussion List[SMTP:CLAYART@LSV.UKY.EDU]
Sent: Wednesday, January 22, 1997 9:11 AM
To: Multiple recipients of list CLAYART
Subject: GlazeChem - Hardwood Ash
From: John Weber
Subject: GlazeChem - Hardwood Ash
To: Multiple recipients of list CLAYART
----------------------------Original message----------------------------
I recently downloaded GlazeChem glaze calculation software and love it.
However, I
use several Hardwood (Fireplace) Ash glazes and the software has no
formula
for
Hardwood Ash. I realize Hardwood Ash is going to always be different but
I
would appreciate anyone who has a formula for a "theoretical" formula for
Hardwood Ash that could be used in the GlazeChem software so I can get at
least an approximate analysis. Thanks.
x >"
Bill Amsterlaw on fri 24 jan 97
Date: Wed, 22 Jan 1997 09:11:55 EST
John Weber wrote:
>> I would appreciate anyone who has a "theoretical" formula for Hardwood Ash
that could be used in the GlazeChem software so I can get at least an
approximate analysis. <<
The following analyses are taken from Phil Rogers' book _Ash Glazes_:
APPLE
----------
SiO2 1.31
Al2O3 -
P2O5 4.9
Fe2O3 1.66
CaO 63.6
K2O 19.24
MgO 7.46
Na2O 10.45
MnO -
SO3 0.93
CuO -
Cl 0.45
BEECH
-----------
SiO2 3.01
Al2O3 -
P2O5 6.2
Fe2O3 0.62
CaO 42.00
K2O 24.29
MgO 8.20
Na2O 8.34
MnO 4.52
SO3 2.10
CuO -
Cl 0.72
OAK
--------
SiO2 15.30
Al2O3 0.13
P2O5 13.8
Fe2O3 2.40
CaO 30.02
K2O 14.00
MgO 12.01
Na2O 9.12
MnO 0.10
SO3 2.61
CuO 0.05
Cl 1.18
PINE
--------
SiO2 10.00
Al2O3 0.43
P2O5 8.8
Fe2O3 4.00
CaO 25.00
K2O 26.50
MgO 6.32
Na2O 8.65
MnO 5.06
SO3 4.63
CuO
Cl 0.52
SPRUCE
-------------
SiO2 2.73
Al2O3 -
P2O5 2.12
Fe2O3 1.42
CaO 33.97
K2O 19.66
MgO 11.27
Na2O 1.37
MnO 22.96
SO3 2.64
CuO -
Cl 0.07
WILLOW
-------------
SiO2 4.44
Al2O3 0.05
P2O5 10.00
Fe2O3 1.25
CaO 20.21
K2O 49.8
MgO 8.26
Na2O 2.50
MnO 0.18
SO3 1.22
CuO -
Cl 0.08
- Bill Amsterlaw (wamster@msn.com)
Plattsburgh, NY
Tony Hansen on fri 24 jan 97
> The World of Japanese Ceramics by Herbert Sanders, pp. 232-33 lists this
> formula for common ash: SiO2 30.99, phosphoric acid 1.91, Al2 O3 8.91, iron
> oxide 3.04, CaO 22.42, MgO 3.3, K2o 3.91,Na2O2.33, MnO1.26, and lost on
> ignition, 21.44
I believe the book Electric Kiln Ceramics lists more than 50 ash formulas.
If there is one consistent thing about ash formulas it is that there is
no concistency!
--
=================================================================
Tony Hansen, IMC - Publishers of INSIGHT/FORESIGHT/Magic of Fire
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