Alisa og Claus Clausen on mon 21 may 01
Glaze test for Chris Clarke Stontium Matt base, cone 6, oxidation.
Source: Chris Clarke
Tested on light, mid-range stoneware, with iron flecks. Fired to 1215c =
(22219) oxidation, at this ramp:
100c to 600c 212f to 1112f
150c to 1100c 300f to 2012f
100c to 1220c 212f to 2228f
soak at 1220c for 30 minutes =20
cool down 100c per hour to 900c (212f/1652f)=20
soak at 900c for one hour
shut off and cool down (aprox. 40 hours)
Recipe:
1.0 Lithium Carb.
20 Strontium Carb.
60 Neph. Syenite
10 Ball Clay
9 Silica
All measurements measured up or down to the nearest whole decimal.
Substitutions: None
=20
For Bronze, added
5.0 Titanium ox, 5.0 Copper carb.
=20
Resulted in a thick, matt patina green glaze, with movement and some =
black streaking. Looks like patinaed bronze as Chris suggests. Looks =
just like the photo in her website at www.ccpots.com Paint or dip =
thickly for strongest greens, otherwise it is browner. Stays where =
applied and opaque.
For Blue and Green added
2 Chrome oxide, 4 Cobalt Carb., 4 Rutile
Resulted in a matt Blue and Green glaze. This glaze is interesting =
because it is not blue/green like a teal, it changes from blue to green =
on the surface. Very sublte changes and a smooth matt surface.
For Graphite added
8 Copper Carb.
Resulted in dark grey matt where thickest, breaking a bit greener where =
thinner. Also a smooth surface with subtle color changes from grey to =
green grey.
=20
Good glazes for textured work Chris, gives a lot of play on the =
surfaces. Thanks.
Best regards,
Alisa in Denmark
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