New Clays are Now Available – Part 2: Mid-fire Clays

This is the second part of a two-fire posting. (For part 1 click here.) This one is regarding mid-fire clays. Please download the Map of Hadar’s One-fire Clays.

Friendly Bronze and One-fire Mokume-Gane Sampler are now available on my online store.

Friendly Bronze

Friendly Bronze

One-fire Mokume-gane Sampler

One-fire Mokume-gane Sampler

Friendly Bronze is a mid-fire clay designed especially for mokume-gane patterns. Mokume-gane patterns cannot be created at high-fire schedule for two reasons:

1. At high temperature too much alloying occurs between the metals.
2. When fired at high temperature, steel does not react with Baldwin’s Patina to become black. That makes it hard to get good contrast between the colors and see the actual pattern.

Friendly Bronze can be also fired on its own in one phase with results similar to Champagne Bronze and Dark Champagne Bronze. For firing a one-metal piece they are interchangeable. The color is similar to that of Quick-fire Bronze.

Flat Bead

The One-fire Mokume-gane Sampler includes 50 grams of Friendly Bronze, 50 grams of Friendly Copper, and 25 grams of Pearl Grey Steel XT. The proportions of the clays correspond to the proportions actually used in a mokume-gane piece. This combination fires in one phase only and results in a smooth surface despite the differences in the clays’ shrinkage rates.

Firing temperature: 1510°F (brick kiln);1560°F (muffle kiln).

For more information about mokume-gane in metal clay see my books: Patterns of Color in Metal Clay and Metal Clay Practice. Classes are now offered by Hadar’s Clay accredited teachers. A beginners’ free project for mokume-gane will be posted soon.

The Instruction Manual for Friendly Bronze and One-fire Mokume-gane Sampler has now been uploaded to the right panel of this blog.


Mokume Flat


As you can see in the photos above, the structural part of a mokume-gane piece has to be made with Friendly Bronze. This is the only clay in the combination that is fired to highest potential. The two other clays are high-fire and are actually under-fired in a mokume-gane piece. Therefore they are not strong enough to comprise the structural part.

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