Karen Gringhuis on mon 11 oct 10
Cushing's HANDBOOK incl. a Jasper Ware recipe as ff:
C/9 vitreous shiny
C & C ball clay 30%
Cornwall Stone 60
Flint 10
total 100%
Macaloid 2%
Footnote: "Firing only to C/8 might be better"=3D20
He describes this as a totally vitreous almost self-glazing body. Adding=
=3D
2
- 4% Cobalt Oxide should give strong blue color. BLUNGE the macaloid in =
=3D
hot
water the night before mixing!!!
Eric Hansen on tue 12 oct 10
Karen: Interesting however that kind of Cornwall Stone is scarce;
maybe substitute a line blended % of new the new Cornwall Stone and
Fluorspar?
- h a n s e n
On Mon, Oct 11, 2010 at 4:05 PM, Karen Gringhuis wrot=
=3D
e:
> Cushing's HANDBOOK incl. a Jasper Ware recipe as ff:
>
> C/9 =3DA0vitreous shiny
>
> C & C ball clay =3DA0 =3DA0 =3DA0 30%
> Cornwall Stone =3DA0 =3DA0 =3DA0 60
> Flint =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 =3DA010
> =3DA0 =3DA0 =3DA0 =3DA0total =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 100%
> Macaloid =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 =3DA0 2%
>
> Footnote: =3DA0"Firing only to C/8 might be better"
>
> He describes this as a totally vitreous almost self-glazing body. =3DA0Ad=
di=3D
ng 2
> - 4% Cobalt Oxide should give strong blue color. =3DA0BLUNGE the macaloid=
i=3D
n hot
> water the night before mixing!!!
>
--=3D20
Eric Alan Hansen
Stonehouse Studio Pottery
Alexandria, Virginia
americanpotter.blogspot.com
thesuddenschool.blogspot.com
hansencookbook.blogspot.com
"To me, human life in all its forms, individual and aggregate, is a
perpetual wonder: the flora of the earth and sea is full of beauty and
of mystery which seeks science to understand; the fauna of land and
ocean is not less wonderful; the world which holds them both, and the
great universe that folds it in on everyside, are still more
wonderful, complex, and attractive to the contemplating mind." -
Theodore Parker, minister, transcendentalist, abolitionist (1810-1860)
Karen Gringhuis on wed 13 oct 10
Eric -=3D20
"Fluorspar" =3D3D CaF4 i.e. NOT a good idea. My understanding is that it
volatilizes and can cause bloating and other problems. There are other
sources of calcium.=3D20
KG
Edouard Bastarache on wed 13 oct 10
Eric,
this one was published in Ceramics Monthly years ago :
C/6
LEPIDOLITE
62.50 %
FLUORSPAR
35.00 %
97.50 %
Gis,
Edouard Bastarache
Spertesperantisto
Sorel-Tracy
Quebec
http://www.flickr.com/photos/30058682@N00/
http://edouardbastarache.blogspot.com/
http://blogsalbertbastarache.blogspot.com/
http://cerampeintures.blogspot.com/
http://www.facebook.com/edouard.bastarache
----- Original Message -----
From: "Karen Gringhuis"
To:
Sent: Wednesday, October 13, 2010 12:41 PM
Subject: Re: JASPER WARE RECIPE
Eric -
"Fluorspar" =3D CaF4 i.e. NOT a good idea. My understanding is that it
volatilizes and can cause bloating and other problems. There are other
sources of calcium.
KG
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