The confiscated holograms were embossed holograms, fundamentally different in method and look from the genuine hologram; an inspector doesn't have to know that one is a Lippmann hologram, the other a Benton hologram
, but surely that inspector can see the difference, especially in the colours?
The great appeal of security labels based on volume holograms lies in their image depth and three dimensionality, often enhanced by spot or full color, which it is impossible to achieve with Benton holograms
. The security efficacy of surface relief holograms no longer relates to the availability of the raw materials; it now relates totally to the optical complexity of the origination and the accuracy of the copying process followed by a highly secure supply chain.