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Dan's Copper Red

As you may have read, I've been trying to glaze some pots with a red glaze (see "Vegas Red ... or not") but have not had a lot of success. I decided to try a different glaze formulated by Dan Dermer. (See Higher Fire Studios)

Before moving away from the Bay Area (San Jose, CA) I asked Joanne at Blossom Hills Crafts for the formulas she uses for her glazes. She was kind enough to provide them and more. She also gave me some glaze formulas by Dan. His "Copper Red" seems to work well in my kiln. And it works on different clay bodies.

Copper Red on Long Beach

This goblet is 6 inches high and 4 inches in diameter. The Copper Red glaze was applied by dipping. The iron in the Long Beach clay body does burn through the glaze a little where the glaze is thin but the color you see is definitely red.

Red Goblet

Copper Red on Colman Porcelain

This vase is 9.75 inches tall and 3.5 inches in diameter. The glaze was applied by spraying. The thickness was not uniform so I'm showing two sides.

Red Vase one side Red Vase other side

Copper Red on Vegas Buff

I saved the best for last.

This vase is 8.5 inches tall and 6 inches in diameter. The bottom part is glazed with "Leach White", another glaze formula from Dan Dermer. The inside was glazed with a clear glaze. The Copper Red was sprayed on, the other glazes were poured and dipped.

Red Top Vase

Dan's Cone 10 Copper Red Formula

Dan has consented to share his Copper Red formula with the world. So here it is:

The basic glaze is this:

ComponentPercentage by weight
Gerstley Borate11.79%
Whiting (Calcium Carbonate)13.62%
Custer Feldspar13.01%
Nepheline Syenite29.20%
EPK (pulverized Kaolin)1.70%
Flint (Silica 200)30.68%

That totals to 100%. Then add these colorants:

Tin Oxide1.75%
Copper Carbonate0.50%

The glaze does require a reduction firing to cone 10 (about 2320 degrees F) and it will run if applied too thickly.

2011-04-26 14:00:01 GMT Comments (0 total)
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Disclaimer: The opinions expressed here are mine and mine alone.