Bob Hanlin on wed 5 mar 97
About a generation ago I worked at a place with another potter. He had a
glaze called "Woo Yellow". He's moved, I never got the recipe, and now I
wand it. Has anyone out there a glaze called Woo Yellow and would be
willing to share.
Bob Hanlin
Oklahoma City, OK
bhanlin@ionet.net
Richard Burkett on wed 5 mar 97
Here's what is probably the original recipe for Woo Yellow. BTW, I've
tried this with the usual strontium carbonate-for-barium substution, and
while it still yields a yellowish glaze, it's not the same.
Glaze name: Woo Yellow
Cone: 9 - 10
Color: Yellow Opaque
Testing: Tested
Surface texture: Stoney Matt
Firing: Reduction
Glaze type: Ba Ca Mg
Recipe: Percent Batch
Kona F-4 Spar 39.29 1964
Barium Carbonate 29.76 1488
Dolomite 14.29 714
EPK 8.33 417
Flint 8.33 417
Totals: 100.00 % 5000 Gm
Also add:
Zircopax 17.86 893
Red Iron Oxide 3.57 178
Comments:
Originally from Clarence Merritt to Gene Lewis - was named Lewis
Yellow. Current recipe from Val Cushing.
Possible Health Hazards:
Barium Carbonate: HIGHLY Toxic-avoid ingestion. Do not use in glazes
intended for use with food.
Unity Formula for Woo Yellow:
0.053 K2O 0.282 Al2O3 1.712 SiO2
0.108 Na2O 6.1:1 Si:Al Ratio
0.235 CaO
0.206 MgO
0.398 BaO
Percentage Analysis:
45.54 % SiO2
12.73 % Al2O3
2.21 % K2O
2.96 % Na2O
5.84 % CaO
3.68 % MgO
27.03 % BaO
Richard Burkett - School of Art, SDSU, San Diego, CA 92182-4805
E-mail: richard.burkett@sdsu.edu <-> Voice mail: (619) 594-6201
Home Page: http://rohan.sdsu.edu/dept/rburkett/www/burkett.html
CeramicsWeb: http://apple.sdsu.edu/ceramicsweb/index.html
Harvey Sadow on fri 7 mar 97
Bob Hanlin wrote:
>
> ---------------------Original message----------------------------
> Has anyone out there a glaze called Woo Yellow and would be
> willing to share.
Woo Yellow ^9-10 Matte
Material Percent
Custer(potash)feldspar 39.1
Barium carb. 29.7
Dolomite 14.0
EPK (kaolin) 8.6
Tin Oxide 8.6
+
Red Iron Oxide 3-4%
This version of the recipe dates back to the early 1970's, possibly even
the late 1960's.
Cheers, Harvey Sadow
Ron Roy on fri 7 mar 97
>----------------------------Original message----------------------------
>
>Here's what is probably the original recipe for Woo Yellow. BTW, I've
>tried this with the usual strontium carbonate-for-barium substution, and
>while it still yields a yellowish glaze, it's not the same.
>
>Glaze name: Woo Yellow
>Cone: 9 - 10
>Color: Yellow Opaque
>Testing: Tested
>Surface texture: Stoney Matt
>Firing: Reduction
>Glaze type: Ba Ca Mg
>
>Recipe: Percent Batch
>Kona F-4 Spar 39.29 1964
>Barium Carbonate 29.76 1488
>Dolomite 14.29 714
>EPK 8.33 417
>Flint 8.33 417
>Totals: 100.00 % 5000 Gm
>
>Also add:
>Zircopax 17.86 893
>Red Iron Oxide 3.57 178
>
>Comments:
>Originally from Clarence Merritt to Gene Lewis - was named Lewis
>Yellow. Current recipe from Val Cushing.
>
>Possible Health Hazards:
>Barium Carbonate: HIGHLY Toxic-avoid ingestion. Do not use in glazes
>intended for use with food.
>
>Unity Formula for Woo Yellow:
>0.053 K2O 0.282 Al2O3 1.712 SiO2
>0.108 Na2O 6.1:1 Si:Al Ratio
>0.235 CaO
>0.206 MgO
>0.398 BaO
>
>Percentage Analysis:
> 45.54 % SiO2
> 12.73 % Al2O3
> 2.21 % K2O
> 2.96 % Na2O
> 5.84 % CaO
> 3.68 % MgO
> 27.03 % BaO
Just an additional comment to the health hazard warning that Richard
included with this glaze.
I compared this glaze with the test data in Ceramics Technical magazine
(issue number 3.)
My conservative guess is that this glaze would release at least 100 times
the recommended "safe" level of Barium into some foods. Just in case anyone
was curious.
Ron Roy
Toronto, Canada
Evenings, call 416 439 2621
Fax, 416 438 7849
Mike Vatalaro on sat 22 mar 97
>----------------------------Original message----------------------------
>About a generation ago I worked at a place with another potter. He had a
>glaze called "Woo Yellow". He's moved, I never got the recipe, and now I
>wand it. Has anyone out there a glaze called Woo Yellow and would be
>willing to share.
>
>
>Bob Hanlin
>Oklahoma City, OK
>bhanlin@ionet.net
Woo Yellow Cone 9/10
F4 --- 33.
Barium Carb -25.
Dolomite- 12.
EPK --7.
Zircopax--15.
Flint---7.
Red Iron---3
Bent.--1
For modifing to cone 6 red. add 2- f4, 20.Gerstly Bor. and take out 5
zircopax
hope this helps -Mike Vatalaro Clemson U
Donald G. Goldsobel on sun 23 mar 97
Bob: Tis came off the Clayart net s few months ago--------------------------
Here's what is probably the original recipe for Woo Yellow. BTW, I've tried
this with the usual strontium carbonate-for-barium substution, and while it
still yields a yellowish glaze, it's not the same.
Glaze name: Woo Yellow
Cone: 9 - 10
Color: Yellow Opaque
Testing: Tested
Surface texture: Stoney Matt
Firing: Reduction
Glaze type: Ba Ca Mg
Recipe: Percent Batch
Kona F-4 Spar 39.29 1964
Barium Carbonate 29.76 1488
Dolomite 14.29 714
EPK 8.33 417
Flint 8.33 417
Totals: 100.00 % 5000 Gm
Also add:
Zircopax 17.86 893
Red Iron Oxide 3.57 178
Comments:
Originally from Clarence Merritt to Gene Lewis - was named Lewis Yellow.
Current recipe from Val Cushing.
Possible Health Hazards:
Barium Carbonate: HIGHLY Toxic-avoid ingestion. Do not use in glazes
intended for use with food.
Unity Formula for Woo Yellow:
0.053 K2O 0.282 Al2O3 1.712 SiO2
0.108 Na2O 6.1:1 Si:Al Ratio
0.235 CaO
0.206 MgO
0.398 BaO
Percentage Analysis:
45.54 % SiO2
12.73 % Al2O3
2.21 % K2O
2.96 % Na2O
5.84 % CaO
3.68 % MgO
27.03 % BaO
Richard Burkett - School of Art, SDSU, San Diego, CA 92182-4805 E-mail:
richard.burkett@sdsu.edu <-> Voice mail: (619) 594-6201 Home Page:
http://rohan.sdsu.edu/dept/rburkett/www/burkett.html CeramicsWeb:
http://apple.sdsu.edu/ceramicsweb/index.html
>>
>>Bob Hanlin
>>Oklahoma City, OK
>>bhanlin@ionet.net
>
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