Adhesive

A means of sticking two surfaces together. In the anticounterfeiting context label adhesive should allow effective application but prevent unauthorised removal.

Achromatic

An optical system free from dispersion or used to describe a colourless (grey tone monochrome) holographic image.

2D hologram

A holographic image style that places a two-dimensional plane of artwork at, in front of, or behind the image plane of the hologram. 

2D/3D hologram

A holographic image style created by a series of two-dimensional planes of artwork that are layered into the image volume of the hologram.