Annealing Copper Wire

Making Copper Wire Flexible Again

Copper wire has a few distinct properties; once it's bent, it stays that way, and it's really hard to take any bends out of it.

The only way to make copper wire flexible again is through the process of annealing it, which is just a fancy way of saying, heating it up.

Make copper wire pliable and easy to work with...

Annealing copper wire is not difficult; you'll need a bit of newspaper or other light weight paper, and a safe place (outside, preferably) out of the wind.

Wind the paper around several pieces of reclaimed copper wire - this is the kind that is used for household wiring, usually with a coating of some kind of insulation, and a rubbery plastic sheath.

This can be peeled off, like a banana peel with care.

So, now your wire is wrapped in paper, set the paper on fire. Use appropriate caution, such as having a fire extinguisher handy, or a bucket of water.

The wire is ready for heating - wrapped in newsprint or newspaper...The wire is ready for heating - wrapped in newsprint or newspaper...
...and set on fire; the fire is slow to start......and set on fire; the fire is slow to start...
...but catches eventually.  Each piece of wire will get hot as the paper burns......but catches eventually. Each piece of wire will get hot as the paper burns...
..and this is why they should be loosely rolled in the paper...and this is why they should be loosely rolled in the paper.
Two or three sheets of newspaper is adequate...Two or three sheets of newspaper is adequate...
...and the wire will be hot to the touch as the paper burns away......and the wire will be hot to the touch as the paper burns away...
...so handle carefully and avoid burning your fingers......so handle carefully and avoid burning your fingers...
The ashes of the paper fall away...The ashes of the paper fall away...

Once the paper is burned off, the wire is now annealed, and will remain flexible until it is once again bent. This process can be used multiple times on the same piece of wire with no ill effects.

Carefully wind the wire around a spool; once you bend it, it again will stiffen up, so gentle persuasion is best.

Now what do you use your annealed copper wire for?

This is an important part of making bonsai, those tiny little trees in the Japanese style, for winding around twig brooms, hanging up almost anything in your garden, because, yes, copper wire will get verdigris on it which is a pale blue green tarnish.

I use copper wire for making rain chains, tying the tops of a twig obelisk, and many other garden crafts. Other projects I've needed copper wire for are heart shaped topiaries, stars and curtain rings.


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