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HOW TO Print/Etch Conductin...View Instructable »
oh and the smallest line around the circle is like 0.3-0.4 mm but intermited. so that might be to small or to long in the etching tank :)
I used a method so you can etch a real circuit, in this case it was a stator for a electrostatic speaker. ill make a how to soon on my Youtube channel. i used a Xerox Solid ink printer. then use heat to let the wax wrap around each wire so the whole wire is covered before etching , so it stays conductive on both sides. the smallest line in this drawing is around 0.8mm