1-way: For this purpose necessary a DC source 25-30V and the concentrated solution of table salt. Connect (+) pole of the source with a foil-clad paper-based laminate on which the future conductors are painted over by a nitropaint. To other clip "crocodile" connected to (-) pole of a source, attach the wadded tampon plentifully impregnated with the solution of table salt. Slightly having pressed a tampon to foil, move it on the foil. Thus the foil which has been not protected by nitropaint is as washed off. To avoid foil heating, impregnate a tampon with a solution is more often and move tampon smooth circular motions. It is recommended to begin with the opposite end from a connected place.
After pickling the nitropaint is washed off by acetone. Rough edges conductor paths are straightened with a scalpel.
2-way: On foil-clad paper-based laminate on is put through a transfer paper the drawing of printed-circuit board. Apertures for fastening of details are drilled. Then is covered by a thin layer of paraffin or wax. Contours of conductor paths are outlined with sharp awl or a needle with easy pressing. From a surface, which should be pickled, paraffin is carefully cleaned off. To foil-clad paper-based laminate on is connected a (+) pole of a source 4-12V (one-two batteries 3336L or similar), and falls to a metal vessel with a table salt solution. The vessel is connected to a (-) pole of a source. Not protected parts of a foil will be pickled - this process can be observed on the greenish scum formed on them. In the process of pickling watch, that the electrolyte did not heat up, else paraffin will begin melt and the circuit board will be spoilt.
