A nylon tipped pen for fast fabrication of perfect printed circuit boards. The ink adheres perfectly to copper & is completely resistant to ferric chloride & other usual etchant solutions. Draw the planned circuit onto a thoroughly cleaned copper laminated board & allow to dry. Then immerse the board in etching fluid until the copper is dissolved. The ink can then be removed with Degreasing Solvent or PCB Cleaner & the circuit board is then ready to be drilled & assembled. This pen is capable of producing thin delicate lines allowing for quite a condensed track layout if required. It can also be used as an indelible marker felt tip pen for an enormous range of materials especially metals.