Mike Martino on mon 24 nov 03
Was RE: yellow ochre and a a bit of titanium PART I
What a coincidence, I just found out what this was the other day. Something
of a letdown I have to confess. Potmill and ballmill are the same thing. A
ball mill is a big version of a pot mill. Or maybe a pot mill is a small
version of a ball mill. Anyway, I saw a small ball mill in my friend's
studio and asked him if he used his ball mill often. He said "I don't have a
ball mill", I said "What's that?", he said "It's a pot mill."
Mike
in Taku, Japan
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG]On Behalf Of lili krakowski
Sent: Monday, November 24, 2003 10:30 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: yellow ochre and a a bit of titanium PART I
Sam asked about yellow ochre the other day and there were answers, but
little more.
Ochre is a wonderful material, and interesting to use.
It seems to me far more plastic than iron oxides, maybe because it is less
refined. It is great in slips.
I use Cooper's Black Slip which contains it.
Red Clay 60
Yellow Ochre 30
Red Iron Oxide 10
Leach writes:
"Ochres, siennas and umbers are all natural earths containing from about 5
per cent. to 12 per cent. of iron. Some are highly platic and may be used
for colouring bodies or as slips. Calcined they are often useful in
stoneware glazes, especially celadons."
And Leach tells that the St Ives Red Slip is "Pure local raw ochre."
He has 3 ochre using glazes.
"Leach's Korean Type:
Feldspar 25
Limestone 25
China clay 6.5
Pike's clay 20
Quartz 20
Calcined ochre 2
Red Iron Oxide 1.5
This is c.7-9 (I assume Seger?) Amber in oxidation and Quiet Grey-green
in reduction
Hamada's Lung Ch'uan Celadon
Feldspar 64
Pine Ash 27
Calcined Ochre 9
Amber in Oxidation, Heavy dull green in reduction. Bottle green when hard
fired. c.6-8
Don' t know what "hard-fired" means. Sorry
Kenzan Celadon
Feldspar 62
Medium Ash 18
China Clay 12
Quartz 2
Calcined Ochre 6
Red Iron Ox. .12
NB> the Fe203 is decimal point 12
And amber in oxidation, transparent olive green in reduction, c.7-9
I am intrigued by the notes: "The ochre, iron, quartz and any coarse ash
should be ground in a pot-mill, the alter native is an opaque mottled effect
beautiful in itself."
And no idea what a pot-mill is either. From the context, elsewhere in the
book, I take it to be a ball mill.
This is getting too long. So tomorrow we do Part II
____________________________________________________________________________
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pdp1@EARTHLINK.NET on mon 24 nov 03
Was RE: yellow ochre and a a bit of titanium PART I
What does he do, put 'Pots' in it and let 'em tumble around
a few ten-thousand times?
Phil
Las Vegas
----- Original Message -----
From: "Mike Martino"
To:
Sent: Monday, November 24, 2003 12:31 AM
Subject: Pot mill vs. Ball Mill, Was RE: yellow ochre and a
a bit of titanium PART I
> What a coincidence, I just found out what this was the
other day. Something
> of a letdown I have to confess. Potmill and ballmill are
the same thing. A
> ball mill is a big version of a pot mill. Or maybe a pot
mill is a small
> version of a ball mill. Anyway, I saw a small ball mill in
my friend's
> studio and asked him if he used his ball mill often. He
said "I don't have a
> ball mill", I said "What's that?", he said "It's a pot
mill."
>
> Mike
>
> in Taku, Japan
>
> -----Original Message-----
> From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG]On Behalf
Of lili krakowski
> Sent: Monday, November 24, 2003 10:30 AM
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: yellow ochre and a a bit of titanium PART I
>
>
> Sam asked about yellow ochre the other day and there were
answers, but
> little more.
>
> Ochre is a wonderful material, and interesting to use.
>
> It seems to me far more plastic than iron oxides, maybe
because it is less
> refined. It is great in slips.
>
> I use Cooper's Black Slip which contains it.
>
> Red Clay 60
> Yellow Ochre 30
> Red Iron Oxide 10
>
> Leach writes:
>
> "Ochres, siennas and umbers are all natural earths
containing from about 5
> per cent. to 12 per cent. of iron. Some are highly platic
and may be used
> for colouring bodies or as slips. Calcined they are often
useful in
> stoneware glazes, especially celadons."
>
> And Leach tells that the St Ives Red Slip is "Pure local
raw ochre."
>
> He has 3 ochre using glazes.
>
> "Leach's Korean Type:
>
> Feldspar 25
> Limestone 25
> China clay 6.5
> Pike's clay 20
> Quartz 20
> Calcined ochre 2
> Red Iron Oxide 1.5
>
> This is c.7-9 (I assume Seger?) Amber in oxidation and
Quiet Grey-green
> in reduction
>
> Hamada's Lung Ch'uan Celadon
>
> Feldspar 64
> Pine Ash 27
> Calcined Ochre 9
>
> Amber in Oxidation, Heavy dull green in reduction. Bottle
green when hard
> fired. c.6-8
>
> Don' t know what "hard-fired" means. Sorry
>
> Kenzan Celadon
>
> Feldspar 62
> Medium Ash 18
> China Clay 12
> Quartz 2
> Calcined Ochre 6
> Red Iron Ox. .12
>
> NB> the Fe203 is decimal point 12
>
> And amber in oxidation, transparent olive green in
reduction, c.7-9
>
> I am intrigued by the notes: "The ochre, iron, quartz and
any coarse ash
> should be ground in a pot-mill, the alter native is an
opaque mottled effect
> beautiful in itself."
>
> And no idea what a pot-mill is either. From the context,
elsewhere in the
> book, I take it to be a ball mill.
>
> This is getting too long. So tomorrow we do Part II
>
>
>
>
>
>
>
>
>
>
____________________________________________________________
________________
> __
> 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.
>
>
____________________________________________________________
__________________
> 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.
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