That's so pretty.
In summer camp and in our material science course at Princeton, we demonstrate this concept - that different portions of a flame produce different temperatures and different results - on a single copper sheet with one torch. We move the torch nearer to and further from the sheet and see reduction or oxidation.
But there's a lot more to using a flame to oxidize or reduce copper. In industry and - I think - in art, it's more common to adjust the mix of oxygen and fuel to change the flame between being oxidizing, neutral, and reducing (also known as carborizing). It's something that's done by plumbers when brazing together copper pipes.
Clearly, the video up top was made by someone who understands all this - maybe understands the science of it but certainly understands the practicality of it because Phoenix Flame Art (by Brent Artman - natch) uses the flame to produce some stunning artwork by preferentially oxidizing and reducing copper sheets.
@phoenix_flame_art Answer @liccalollipop Which group are you?? LINES OR NO LINES??? #PHOENIXFLAMEART #youchoose #contriversal #oneortheother #artinspo #poll #question #feedback #flameart #coldest @thecoldestwater ♬ FEEL THE GROOVE - Queens Road, Fabian Graetz
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