how to make a SIMPLE technology. Batteries use metal

The video shows the technology of drawing on metal. How to draw. The image was created by electrochemical artistic etching. Etch on a stainless steel blade. The krone battery is used as a direct current source. The video shows the whole step-by-step process of creating a pattern on a knife and is accompanied by pleasant music. I wish you a pleasant viewing. To support and develop the channel