Comment

Comment by George Lewter on September 19, 2013 at 8:21pm

Wanted to update this with the Chris Clark recipe. As you, see the base recipe is the same as the Pinnell's, but there are couple of colorant variations.

found on clayart:

Chris Clarke Strontium Matte

Cone: 6 Color: Bronze, Blue and Green
Firing: Oxidation Surface: Matte

Amount Ingredient
1 Lithium Carbonate
20 Strontium Carbonate
60 Nepheline Syenite
10 Ball Clay–Old Mine #4
9 Silica

100 Total

Comments: All measurements measured up or down to the nearest whole decimal.

Substitutions: None

For Bronze, added 5.0 Titanium ox, 5.0 Copper carb. (G.L. note: This makes it the same as Pinnell's weathered bronze green)

Resulted in a thick, matt patina green glaze, with movement and some =
black streaking. Looks like patinaed bronze as Chris suggests.  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

Comment by Joan Scott on January 12, 2012 at 3:06pm

Pardon my ignorance but I do not know Chris Clarke. I would be in interested to compare the two glaze components if I can view Chris Clarke's strontium matte. Pete Pennel's recipe is as follows

Strontium Blue Bronze cone 6 oxidation
Glaze Material	Percent
Lithium Carbonate	1 %
Strontium Carbonate	20
Nepheline Syenite	60
Ball Clay	10
Silica (Flint)	9
Total	100 %
Add: Cobalt Carbonate	1.5 %
Copper Carbonate	4 %
Note: This is a variation of Pete Pinnell’s Bronze Green and usually has a matt surface. It is not a food-safe glaze, but would work well on the outside of functional forms or on sculpture.

Note by George Lewter 9/19/2013- Weathered Bronze Green has 5% Copper Carbonate and 5% Titanium Dioxide

Comment by Teresa Wooden on January 11, 2012 at 9:45pm

Thanks, Joan. This is Chris Clark's Strontium Matte.

Comment by Joan Scott on January 11, 2012 at 10:08am

Very nice piece. Is the glaze Pete's weathered bronze or blue or variation? I use this glaze also it can be vary dramatic! 

Comment by Teresa Wooden on February 25, 2011 at 8:45pm

Thank you, George!  Yup, the feathers did not turn out as intended.  The next one will have the feathers laid on and sculpted in.  This bowl got lots of attention at the shows and did sell.  Will definitely pursue the evolution of the idea.  Thanks for the encouragement.  :)

Comment by George Lewter on February 25, 2011 at 3:58pm

This is a wonderful piece. . . flawed but reaching for perfection. We can see the wings obscured by the glaze, probably more than was intended. If the glaze had broken a little more over the contours how those feathers would have jumped out. Still the image of the two birds looking at each other and entwining wings to form a unified vessel has great power.

Comment by Teresa Wooden on October 5, 2010 at 7:58am

Glaze: Chris Clarke's Strontium Matte.