FIRECOLOUR portrait -early prototype

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FIRECOLOUR portrait -early prototype

1. take clean copper sheet ,brush on a few contour lines with thin water colour brush and very diluted watercolour. This will 'burn off' to black .
2. place immediately in preheated oven 1-2hrs till annealed , you will be left with a grey sheet with an outline drawing.
3. erase back to copper with torch , then hit up select areas with the torch for all the colours you need. No colours are painted on , they are all a function of heat.


lin's picture

portrait

It absolutely amazes me what you can do with your torch. I have played with a few heat patinas, just enough to know I am not good at it. Your pieces are beautiful! Lin


colinalexander777's picture

Thank you Lin ,

but don't be so sure you're not good at it , I could show you a couple of tricks to make it alot easier .


marilyn's picture

I am very impressed with

I am very impressed with this!

When you say to put a sheet of copper in the oven, do you mean a kitchen overn or a kiln? What heat setting for either?

marilyn


visitor's picture

Just a conventional oven. I

Just a conventional oven. I usually have it at 350 , and then take it out when I have the colour I want. The colour sequence the oven puts it through, is this: red , purple , platinum , gold , red-pink , green , and finally dark grey. It takes a bit of experimentation until you are able to get the consistent colours you want , but annealing is just a matter of leaving it in the oven long enough.


Rich Waugh's picture

I'm surprised that oyu can

I'm surprised that you can get annealing to take place at a temperature that low. It has been my experience that it usually takes more than 500F, even when done for extended soak times, to get copper fully annealed for further hammer work.

How soft is the copper when you're finished with the annealing process?


colinalexander777's picture

Greying-Annealing

The copper is quite soft after I prime the sheet , almost like lead . If I don't hold it in 2 hands it has a tendency to bend under it's own weight. What is a soak time? Perhaps I am not fully "annealing " it , but I get the desired effect at relatively low temperatures.


Rich Waugh's picture

Soak time is noting more

Soak time is noting more than the amount of time the metal remains at temperature, in your case a couple of hours. I'm surprised to hear that it seems to fully anneal at that low a temperature, but that's good information to have. Thanks, I learn something new every day!