How can one side copper clad laminate make circuit?
Corrosion using concentrated hydrochloric acid + hydrogen peroxide can be, after corrosion, wipe off the ink on the OK
You can use the complex oil draw line, then more complex corrosion; you can print to oily paper, then put the oil on paper line transfer to copper by thermal machine, then the corrosion.
If so, simple circuitry can be engraved with a knife;
