Hi, could some one recommend some echant which etches gold but not Nickel or other nickel alloys. thanks for helping chen-han /////////////////////////////////// Chen-Han Lee Research Student School of Manufacturing and Mechanical Engineering, University of Birmingham, Birmingham, B15 2TT United Kingdom, Phone : +44 121 4144245 Fax : +44 121 4143958 E-Mail : dcl815@bham.ac.uk ///////////////////////////////////