Lichtenberg Figures on wood (Fractals Lichtenberg Figures)

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A huge (high voltage) electrical discharge on a wood surface (treated with an electrolyte salt solution) yields this dendritic fractal pattern named after the German physicist, Georg Christoph Lichtenberg.

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High voltage pyrography on wood done by Ben Dworski-Riggs can be seen at his website

This very dangerous, high voltage process can be seen in this YouTube video.