I am trying to blacken a copper strip (will probably come in reels, which also makes this more difficult). I know this can be done by a number of different methods, but I need something that can keep surface electrical conductivity after blackening. This seems much more difficult to achieve.
Has anyone heard of Ebenol C or Ebonol C? these products can apparently do this, but I cannot find anyone to do a coating test for us!! I have managed to get some spec sheets from different chemical companies, but they don't seem to be able to connect me with anyone that uses such products!!
Any and all help will be appreciated.