Well, I may have a new hobby! LOL! And I will probably burn down this house! But oh! What fun! These were all done using a small kitchen torch and
Amaco's light weight and medium weight copper.
I did quench most of these in water, but none in ice water. I will be doing more experiments using a bigger torch (just bought one at ACE) and using more oils and lotions to experiment with. I think that's the key...just play!
Circles made by taking the torch in and out from the copper and dipping in water between layers of color:

Inked a
Paper Artsy rubber stamp with Mr. Clean Blue, stamped the copper, then heated it, then dipped in water.

This was done by spritzing with Mr Clean blue while holding the copper perpendicular during heat. As the solution runs off you get these lovely streaks....

For this piece, I heated the copper, dipped it in water, spritzed with Mr. Clean, heat, dip, spritz...just keep repeating til you get something you like.

Just a variation of the same technique

this is with kitty litter:

and yet another example of repeat dipping with Mr. Clean. I think we used Liver of Sulpher here as well.

After 4 or 5 dips, the Mr. Clean starts to form black lines....now this is what I call watercolor painting! But rather than a brush, it's done with a torch!

And this one..just lovely...I like it almost the best!

Want to know more? Well...stay tuned for the book! I have loads more experiments to do first. But painting copper with a torch....what fun!
Basic things to consider:
1. Dipping in ice cold water is not essential to get great colors. But dipping in something that is cooler than the temp of the hot copper gets amazing results.
2. Never follow the "rules" that someone else writes (including me!) Just do your own thing, play, and have some fun with it!
3. Since you are working with a torch, KNOW where the fire extinguisher is! LOL!!
4. Make sure you have a burn kit in your first aid kit.
5. Work over a firing brick, or outside on a day with no wind - don't want to be burning down your neighbor's house either!
6. Cooking oils will burn off. Fish oils will leave a pattern. Other oils...just play with them and see what you get!
7. Stamps give great background designs for this technique.
Now, I'm sure I've forgotten something. I'll keep you posted as I experiment and play! I want to try ammonia and salt, potato chips and water, sawdust and vinegar! LOLOL!
Ahhh....retirement! It sure is great!!!