David Woof on fri 8 apr 11
Hi all=3D2C =3D20
I think Tom would have been pleased with us exchanging mugs or cups using h=
=3D
is Celadon as a respectful rememberence=3D2C and an edifying experience for=
u=3D
s as we see the outcomes from such a variety of folk's kilns=3D2C applicati=
on=3D
s=3D2C and firings.
=3D20
What do you think for Seattle 2012?
=3D20
David Woof... musing this am about his empty shoes and the space he occupie=
=3D
d near so many lives. What else is there to take or leave behind but to c=
=3D
ontribute and be remembered for this generosity?
______________________________________________-
=3D20
13a. Tom Buck Celedon/ John Britt/2006
Posted by: "Mike Gordon" clayart@EARTHLINK.NET=3D20
Date: Tue Mar 29=3D2C 2011 8:58 am ((PDT))
TOM BUCK CELADON Cone 10=3D20
Custer Feldspar 30.00
Wollastonite 25.00
Grolleg Kaolin 21.00
Silica 24.00
=3D20
Black Iron Oxide 1.00
=3D20
Tom is the man!
=3D20
John Britt
www.johnbrittpottery.com
_________________________________________________________=3D20
14. glaze receipe from Tom Buck/2006
Posted by: "Mike Gordon" clayart@EARTHLINK.NET=3D20
Date: Tue Mar 29=3D2C 2011 8:59 am ((PDT))
Janine Roubik:
I assume you are firing to Cone 10 and in reduction part of the
time=3D2C otherwise you would not be quoting from John Britt's book=3D2C on=
e of
the few places where my original Celadon glaze is cited.
I mostly do Cone 6 oxidation (+raku) these days but I did design
the Celadon blue for Cone 10 with light or zero reduction. Black iron
oxide (FeO) is a very stable compound in a Cone 10 firing but it will
act
as a "flux oxide" and if present above a minimal level it will melt
alumina and silica. Which is why so little black oxide is used in a
celadon=3D3B half (maybe) acts as flux=3D2C half as colourant.
If you have spanish red iron oxide=3D2C be aware that it contains
83-87% by weight of Fe2O3 (iron oxide red) and so that lower Fe2O3
content
has to be considered when you replace Black Iron Oxide=3D2C FeO=3D2C which =
is
high
grade probably close to 100% by weight. Also=3D2C if your yellow iron oxide
is
pigment grade (and not yellow ochre which contains some clayey material>
then it too is high grade close to 100% Fe2O3.H2O or hydrated red iron
oxide.
So=3D2C try my recipe and use Yellow Iron Oxide (pigment grade) in
place of the 1% by weight of Black Iron Oxide (FeO). If you wish to be
precise=3D2C add 1.13% yellow oxide and you will get 1% FeO when reaching
higher cones. The success of this glaze depends on your claybody and how
you fire the ware.
If you have spanish red=3D2C 1.18% will equal 1% black oxide.
Celadon colours are "solution" colours=3D2C that is=3D2C the iron oxide wil=
l
actually dissolve (as opposed to dispersion or suspension) in the
Liquidus
(molten glaze)=3D2C and when cooled=3D2C the widely located iron oxide (FeO=
)
molecules will reflect incident white light in green or blue
wavelengths.
may your tests go well. peace Tom B.
Tom Buck ) -- primary address.
"alias" or secondary address.
tel: 905-389-2339 (westend Lake Ontario=3D2C province of Ontario=3D2C Canad=
a).
mailing address: 373 East 43rd Street=3D2C Hamilton ON L8T 3E1 Canada
=3D20
=3D20
=3D
| |
|
