Copper from Clay

Copper Metal Clay by Sherry Cordova and Pat Accorinti
Copper metal clay pieces by Pat Accorinti (right) and Sherry Cordova - before firing, alongside copper wire for color comparison

Friends Pat Accorinti, Kathleen Gordon, and I are going to be giving a demo to the local metal clay guild on Feb 21st. The demo will include a hands on session for members to use the new Art Clay World copper clay product.

We thought we should try it out first, and here are pics from our first session with the new copper product.

Copper Metal Clay and bracelet by Sherry Cordova
Copper end caps after firing, alongside unfinished copper wire bracelet. Notice the color difference and oxidation on the fired clay

Making a set of end caps for this bracelet was the idea I had in mind.

Hand knit copper wire bracelet in progress by Sherry Cordova
Hand knit copper wire bracelet in progress

Learning the properties of the new clay made the process take longer than constructing the piece from tubing and sheet; so I reminded myself that speed wasn’t the reason we were doing this. 🙂 Texturing the clay would have been a good reason to choose this method over soldering. The person who the bracelet is being made for likes clean simple lines, so the copper clay end caps are simple and soon to be cleaned up.

Oven mitt with evidence of fire from Kiln heat
Oven mitt with evidence of fire from kiln heat

The manufacturers suggested firing schedule for the clay is to heat the kiln up to 1778 deg F and put the pieces in the hot kiln for 30 minutes, then remove the pieces from the hot kiln and immediately quench. I need different gloves for this in the future, or I need to wet the gloves ahead of time so they don’t catch fire each time. 🙂 After placing the items in the hot kiln, I decided to use casting flask tongs to remove the items from the kiln instead of my shorter copper tongs.

Copper oxidation knocked off during quench
Copper oxidation knocked off during quench

Quenching the copper was dramatic: my gloved hand in a hot kiln, the usual sizzle of the hot metal hitting the water, and then I watched oxidation come off the outside of the pieces. The inside of the pieces was still coated with oxidation, so those pieces visited a pickle pot.

Copper pieces after kiln firing and quenching (pieces by Sherry Cordova and Pat Accorinti)
Copper pieces after kiln firing and quenching and before pickling (pieces by Sherry Cordova and Pat Accorinti)

2 Replies to “Copper from Clay”

  1. Just got some of the copper clay. Looks like you had some fun. I wish I could make it to your presentation. Be careful with your oven mitts!

Comments are closed.