Copper metallised Holographic Films exhibits an aesthetically appealing copper lustre. There are two main reasons for the introduction of copper metallization as an alternative to standard silvery coloured aluminium; the first is the bright lustre of the copper, which is difficult to be replicated by using standard aluminium metallising with chemical pigments or dyes and the second is the de-metallising of copper, which is somewhat harder than the de-metallising of aluminium. In the de-metallising process the metal is removed by chemical or physical process to print letters, logos or patterns within the metallised side. De-metallising add another feature to the security hologram to fight counterfeiting.
The other added advantage is the electrical conductivity of copper, which could be used for other applications such as RFID antenna.
Copper metallised holographic films can also be used for banknotes to replace the silvery coloured thread.