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glaze test for chris clarke stontium matt base, cone 6, oxidation.

updated tue 22 may 01


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)

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
For Bronze, added
5.0 Titanium ox, 5.0 Copper carb.
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 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.
Good glazes for textured work Chris, gives a lot of play on the =
surfaces. Thanks.

Best regards,
Alisa in Denmark