Lily Krakowski on wed 12 mar 03
Coal Ash 20.5
S. Devon Ball Clay 8.3
Whiting 21.5
Feldspar 31.8
Red Clay 3.1
Ochre 1.6
Quartz 13.2
Credited to Peter Smith, in Robert Fournier's Illustrated Dictionary of
Practical Pottery, 3rd edition
Lili Krakowski
P.O. Box #1
Constableville, N.Y.
(315) 942-5916/ 397-2389
Be of good courage....
Hendrix, Taylor J. on wed 12 mar 03
Odd Lily,
I found the coal ash reference in Fournier's. Thank you, but when I
went to look coal or fly ash up in Hamer's _The potters' dictionary of
materials and techniques_ I could find nothing. Hamer mentions only
wood and bone ash.
Taylor, in Waco
-----Original Message-----
From: Lily Krakowski [mailto:mlkrakowski@CITLINK.NET]=20
Sent: Wednesday, March 12, 2003 7:46 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: coal ash
Coal Ash 20.5
S. Devon Ball Clay 8.3
Whiting 21.5
Feldspar 31.8
Red Clay 3.1
Ochre 1.6
Quartz 13.2
Credited to Peter Smith, in Robert Fournier's Illustrated Dictionary of
Practical Pottery, 3rd edition
Lili Krakowski
Ababi on wed 12 mar 03
Coal ash Generic:
COAL ASH............ 1.00 100.00%
========
1.00
CaO 0.46* 4.08%
My teacher brought me some ash they used near her home for road building. I
sieved it and added it to glazes. Nothing special with this material. I
looked for information in the net and found
http://www.bgu.ac.il/IAR/Zabicky.htm Professor Zabiky wrote me that it was
not an expensive material and I could by in a low cost some tons.
I did not go on because it was not so interesting.
CaO: 0.46
MgO: 0.54
TiO2: 0.09
Al2O3: 2.01
P2O5: 0.05
SiO2:4.96
Fe2O3: 0.39
I got it fro a clayarter in 1998 I believe from Rogers's ash glazes book.
Clean and flyless ash
=====================
BONE ASH............ 1.8 1.77%
DOLOMITE............ 6.0 5.84%
TALC- NYTAL......... 5.1 5.00%
RUTILE.............. 0.8 0.75%
EPK KAOLIN.......... 76.7 75.19%
FLINT............... 3.7 3.64%
R.I.O............... 8.0 7.81%
========
102.0
CaO 0.44* 3.99%
MgO 0.53* 3.40%
K2O 0.02* 0.30%
Na2O 0.01* 0.08%
TiO2 0.09 1.17%
ZrO2 0.00 0.01%
Al2O3 2.01 32.79%
P2O5 0.05 1.17%
SiO2 4.93 47.39%
Fe2O3 0.38 9.71%
Text1 7.03
Si:Al 2.45
SiB:Al 2.45
Expan 5.92
About the same. Without track
----- Original Message -----
From: "Lily Krakowski"
To:
Sent: Wednesday, March 12, 2003 3:45 PM
Subject: coal ash
> Coal Ash 20.5
> S. Devon Ball Clay 8.3
> Whiting 21.5
> Feldspar 31.8
> Red Clay 3.1
> Ochre 1.6
> Quartz 13.2
>
> Credited to Peter Smith, in Robert Fournier's Illustrated Dictionary of
> Practical Pottery, 3rd edition
>
>
>
>
> Lili Krakowski
> P.O. Box #1
> Constableville, N.Y.
> (315) 942-5916/ 397-2389
>
> Be of good courage....
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
Ababi on thu 13 mar 03
I tested the coal ash with Tony Hansen's 20/5 I recalculated, was the same just
dirtier.
Ababi
---------- Original Message ----------
>Odd Lily,
>I found the coal ash reference in Fournier's. Thank you, but when I
>went to look coal or fly ash up in Hamer's _The potters' dictionary of
>materials and techniques_ I could find nothing. Hamer mentions only
>wood and bone ash.
>Taylor, in Waco
>-----Original Message-----
>From: Lily Krakowski [mailto:mlkrakowski@CITLINK.NET]
>Sent: Wednesday, March 12, 2003 7:46 AM
>To: CLAYART@LSV.CERAMICS.ORG
>Subject: coal ash
>Coal Ash 20.5
>S. Devon Ball Clay 8.3
>Whiting 21.5
>Feldspar 31.8
>Red Clay 3.1
>Ochre 1.6
>Quartz 13.2
>Credited to Peter Smith, in Robert Fournier's Illustrated Dictionary of
>Practical Pottery, 3rd edition
>Lili Krakowski
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
iandol on sat 15 mar 03
Dear Friends,
Did a Google Search for Fly ash and Coal Ash. Found about half a million =
entries if you fancy having a sort through.
In general it appears as though Fly Ash is compounded of a Glass =
composed of Alumina, Silica and Iron Oxides, in the form of spheres =
which is formed above 1200=B0 Celsius.
I also found from www.uga.edu/srel/d.area.htm the following information =
for people who may think to use it as a glaze additive and I quote:=20
<elements and heavy metals, including Al, As, Cd, Cr, Cu, Hg, Ni, Pb, Se, =
Sr, V, and Zn.>>
Note, before you panic, that General Coal Ash is composed of all of the =
ash from the combustion of coal and that every seam of coal will give a =
different assay from its ash so not all of those elements may be =
present.
Perhaps caution and research is needed before it is employed in Domestic =
Glazes.
Best regards,
Ivor Lewis. Redhill, South Australia.
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