John Rodgers on sun 9 sep 07
I have been experimenting some iron glazes, and have been able to get
close to a blue when fired to cone 6 oxidation, but not quite. Comes out
a blue-grey. I hope to eventually get it to a blue color. In the
meantime - I seem to remember something about Harding Black and iron
blue glaze. Anyone know anything of this? Would appreciate a reference.
Thanks,
John Rodgers
Chelsea, AL
Ben Shelton on mon 10 sep 07
I also found this recipe
here is the link to the original post
http://lsv.ceramics.org/scripts/wa.exe?A2=ind9909&L=CLAYART&P=R66564
Cone 5 glaze variation - HB Blue.
Glaze Clear Elect.
G200 P Feldspar 30.50
Silica 31.00
Whiting 13.50
Kt. Ball Clay 13.50
Zinc Oxide 2.00
Soda Bicarb 2.50
Barium Carb 6.00
Colemanite 15.00
Add Copper Oxide 5.00 Turquoise
12.00 Green-black metallic blush
15.00 Green-black Metallic
<<<<<>>>>>>
HB Blue Glaze - Substitute Borax for colemanite - must ball mill - use CuO
<<<<<>>>>>>
White for overpainting 10 Zircopax
Base Clay -
3 Cedar Heights Redart,
1 Ocmulgee Red Brick Clay
I've never fired this glaze so I don't know anything about it except
that it's beautiful and I treasure the one piece of Harding Black's work I
have which I believe has this glaze on it, a little pitcher dated 1973. He
did mention when speaking in San Angelo a few years ago that he used = to
=3E take buckets out to D'Hanis Texas and buy clay at the Brick and Tile =3E
Factory........this might be the Ocmulgee Red Brick Clay ( which = probably
=3E originates in Georgia.....the area around the Ocmulgee River being the
=3E ancestral stomping grounds of the Studstill Family). =3E =3E Good Luck
and have fun with it. Pam Studstill, in Texas where the = morning air =3E is
mild and fragrant with exhaust and a touch of autumn. =3E
Hope this is a help
Ben
Ben Shelton on mon 10 sep 07
John,
do you mean like this??
http://web.qx.net/bennypapa/pottery/hardingblack2sm.jpg
http://web.qx.net/bennypapa/pottery/hardingblack1sm.jpg
I have always loved this mug since I got it from Mr Black in 1991 or so.
Do you have any pictures of your tests? What kind of clay are you working with?
I think I have the formula he gave me. I'll dig it up when I get home.
Ben
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