In message , "Richterkessing, Frank H (GEA, 055132)" writes >Some comments on William Westfield's post: >> Manufacturer: Staedtler >> Model: Lumocolor 313 AV >> Ink color: Red >> >Noted and filed for future reference. I've just tried a Staedtler Lumocolor 318, which is sold by Maplin as an etch resist pen, putting some tracks on the laminate by hand. It worked very well, with FeCl3 as the etchant. The tip is too broad to put tracks between IC pads, though. Is the 313 narrower? Leon -- Leon Heller: leon@lfheller.demon.co.uk http://www.lfheller.demon.co.uk Amateur Radio Callsign G1HSM Tel: +44 (0) 118 947 1424 See http://www.lfheller.demon.co.uk/rcm.htm for details of a low-cost reconfigurable computing module using the XC6216 FPGA