Randy McC on tue 27 sep 11
I would appreciate any comments on this glaze and what I am trying to do. T=
=3D
his glaze is a wonderful iron red works every time. It layers extremely we=
=3D
ll. Cone 6. I am interested in using it as a base glaze for other colors. =
=3D
Is this glaze stable? If not could someone rework it for me. Comments appre=
=3D
ciated. Recipe Name: C HARRIS TEMMOKUCone: 6 Color: TEMMOKU
Firing: Oxidation Surface: GlossyAmount Ingredient
18.6 Nepheline Syenite
8.5 Gerstley Borate--1999
9.3 Dolomite
9.3 Talc
18.6 Ball Clay Number 1
28.2 Silica
7.5 Bone Ash100 Total Additives
11 Iron Oxide--RedUnity Oxide
.104 Na2O
.032 K2O
.359 MgO
.505 CaO
1.000 Total.323 Al2O3
.094 B2O3
.005 Fe2O32.907 SiO2
.008 TiO2
.067 P2O59 Ratio
61 ExpComments: =3D20
-----------------------------------
Calculations by GlazeMaster=3D99
www.masteringglazes.com
------------------------------------
Randy =3D
John Hesselberth on tue 27 sep 11
Hi Randy,
Overall, it looks pretty good. It certainly has enough alumina (0.323) =3D
and silica (2.907) to be stable. My only worry is that the boron (0.094) =
=3D
is a little low to assure complete melting at cone 6. I like to see a =3D
boron level of at least 0.2 (or the same amount of zinc) in cone 6 =3D
glazes. Melting may well depend on what colorants you add as some do =3D
provide help in melting. So I would vinegar test it with several =3D
different colorants or colorant combinations to make sure it passes that =
=3D
test. Or you could just test it with 4 or 5% copper carbonate. If it =3D
does well there it will probably be OK with most.
It may also depend on how well your GB analysis actually matches what is =
=3D
in your bag. Just selecting a different GB from those in your =3D
GlazeMaster materials file will let you see how important that variable =3D
is. With only 8.5% GB in your recipe it probably will not be a big =3D
effect.
Regards,
John
On Sep 27, 2011, at 6:39 AM, Randy McC wrote:
> I would appreciate any comments on this glaze and what I am trying to =3D
do. This glaze is a wonderful iron red works every time. It layers =3D
extremely well. Cone 6. I am interested in using it as a base glaze for =
=3D
other colors. Is this glaze stable? If not could someone rework it for =3D
me. Comments appreciated. Recipe Name: C HARRIS TEMMOKUCone: 6 =3D
Color: TEMMOKU
> Firing: Oxidation Surface: GlossyAmount Ingredient
> 18.6 Nepheline Syenite
> 8.5 Gerstley Borate--1999
> 9.3 Dolomite
> 9.3 Talc
> 18.6 Ball Clay Number 1
> 28.2 Silica
> 7.5 Bone Ash100 Total Additives
> 11 Iron Oxide--RedUnity Oxide
> .104 Na2O
> .032 K2O
> .359 MgO
> .505 CaO
> 1.000 Total.323 Al2O3
> .094 B2O3
> .005 Fe2O32.907 SiO2
> .008 TiO2
> .067 P2O59 Ratio
> 61 ExpComments: =3D20
> -----------------------------------
> Calculations by GlazeMaster=3D99
> www.masteringglazes.com
> ------------------------------------
>=3D20
>=3D20
> Randy =3D20
Karin Givon on tue 27 sep 11
I'll try This temmoku from Randy McC..... I'd love one of these. Is =3D20
that slow-cooled, or is that a no brainer? If you slow cool, just where?
I'm developing ( or I HOPE I"m developing) a tenmokku at ^6 that is =3D20
held but not slow cooled,,,,,it may be a dream but it worked once, or =3D20=
=3D
maybe twice, so now to try again and again--like Mel, I test a lot of =3D20=
=3D
times before I know what all a glaze will do. Unlike Mel, I only have =3D20=
=3D
access to an electric kiln so what a challenge that is ofter almsot =3D20
45 years of firing reduction! Sheesh.
So Randy, if you would be so kind, can I know your firing schedule? I =3D20=
=3D
'd love a Kaki and a temmoku, and I'd like them to be somewhat =3D20
consisitent. (Ha, I know)
Thanks for any input.
Karin Givon
On Sep 27, 2011, at 3:39 AM, Randy McC wrote:
I would appreciate any comments on this glaze and what I am trying to =3D20=
=3D
do. This glaze is a wonderful iron red works every time. It layers =3D20
extremely well. Cone 6. I am interested in using it as a base glaze =3D20
for other colors. Is this glaze stable? If not could someone rework =3D20
it for me. Comments appreciated. Recipe Name: C HARRIS TEMMOKUCone: =3D20=
=3D
6 Color: TEMMOKU
Firing: Oxidation Surface: GlossyAmount Ingredient
18.6 Nepheline Syenite
8.5 Gerstley Borate--1999
9.3 Dolomite
9.3 Talc
18.6 Ball Clay Number 1
28.2 Silica
7.5 Bone Ash100 Total Additives
11 Iron Oxide--RedUnity Oxide
.104 Na2O
.032 K2O
.359 MgO
.505 CaO
1.000 Total.323 Al2O3
.094 B2O3
.005 Fe2O32.907 SiO2
.008 TiO2
.067 P2O59 Ratio
61 ExpComments:
-----------------------------------
Calculations by GlazeMaster=3D99
www.masteringglazes.com
------------------------------------
Randy
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