Richard Burkett on sun 17 aug 97
Just out of curiosity in an idle moment over breakfast coffee, I took the
analysis of the Mars rock "Barnacle Bill" and plugged it into HyperGlaze
to see what it looked like as a glaze as is - not too far off of a cone 10
magnesium matte as it turns out. So, it might work, but it's pretty
overloaded with iron oxide as glazes go so it may well be somewhat
gun-metal metallic (and possibly runny) in nature.
If any of you out there are interested in giving this a try, let me know
the results.
Glaze name: Barnacle Bill Mars Matte
Cone: 9 - 10
Color: Opaque Brown to black?
Testing: Untested
Surface texture: Semi-Matte or Satin?
Firing: Ox. or Red.?
Glaze type: Mg Ca
Recipe: Percent Batch
Custer Feldspar 58.73 293.6
Dolomite 15.42 77.1
EPK 9.69 48.5
Talc 0.76 3.8
Flint 15.40 77.0
Totals: 100.00 % 500.0 gm
Also add:
Red Iron Oxide 16.51 82.6
Rutile 0.75 3.8
Manganese Diox. 1.02 5.1
Comments:
A theoretical calculation of what a glaze would look like made from
'Barnacle Bill' rock on Mars, using the analysis sent back from
Sojourner on Mars, but reformulated using commonly available Earth
materials. This POSSIBLE glaze is pretty overloaded with iron, so TEST
FIRST! NOT a good candidate for a glaze for functional ware.
Possible Health Hazards:
Talc: wear a NIOSH approved dust mask when handling dry material
Flint: free silica-wear a NIOSH approved dust mask when handling dry
material
Manganese Dioxide: TOXIC-avoid inhalation-wear a NIOSH approved dust
mask when handling dry material
Unity Formula for Barnacle Bill Mars Matte:
0.235 K2O 0.504 Al2O3 3.787 SiO2
0.108 Na2O 0.004 Fe2O3 7.5:1 Si:Al Ratio
0.340 CaO
0.317 MgO
Percentage Analysis for Barnacle Bill Mars Matte:
66.85 % SiO2
15.11 % Al2O3
6.50 % K2O
1.97 % Na2O
5.62 % CaO
3.76 % MgO
0.18 % Fe2O3
Richard
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/
HyperGlaze@aol.com & http://members.aol.com/hyperglaze/
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