Experimenting with Prometheus Bronze Clay

I've just tried out a new bronze clay that doesn't require activated carbon for firing. It's made in France and called Prometheus Bronze Clay.


I decided to test it by making a simple sculpted pair of cat earrings. Meet Claude and Claudia (get it?..Clawed??)

I liked working with it in it's clay stage a lot. It had a nice feel to it, parts attached very easily with just a little water, smoothed and sanded nicely..... It reminded me of Original PMC in it's feel.

For firing, you can fire it wrapped in paper towels and kiln blanket or fire it open. For my first experiment, I tried it wrapped. Each piece was first wrapped in half a paper towel, then both were rolled together in a kiln blanket. They were fired for 30 minutes at 700 degrees C /1292 degrees F. It was straight forward.


After firing, I took them out and quenched them in cold water. At this stage, black oxidised flakes came off. On one of them, a large chunk came off the front, causing a big indentation. Both seemed fully scintered.

The result was two very pink colored cats. I polished them and tumbled them.

My main comment re. the fired pieces was that the bronze looks mottled in color. There is definitely a rosy tinge to the bronze, but it seems a little patchy in the pieces. A more golden color shows through in some areas as you can see in the photos.


Anyhow - I assembled the cats, as I wanted to figure out how to do the four legs! The legs now ring very gently against the body - making them sound like quiet little bells!

Anyone else get this mottled rose and golden bronze in the same piece? What have your experiences been trying out this new clay? I'd love to hear. I'm going to try and open firing next and see how that compares.