I think what Victor is looking for is IPC-4555, but don't know if that spec ever got released. George Milad, do you know? Doug Pauls Principal Materials and Process Engineer Rockwell Collins On Thu, May 24, 2018 at 2:13 PM, Jose A Rios <[log in to unmask]> wrote: > Not in the IPC TM-650 Methods manual. > > > On May 24, 2018, at 2:56 PM, [log in to unmask] wrote: > > > > Fellow TechNetters: > > > > Is there an OSP Surface Finish thickness measurement TM-650 Standard. > > > > Victor, >