An optically variable feature composed of grids that diffract light. This allows various images and effects to be generated, including colour changes (shifts) as well as 2D and 3D images.
A hologram consists of a 2D or 3D image.
An optically variable feature composed of grids that diffract light. This allows various images and effects to be generated, including colour changes (shifts) as well as 2D and 3D images.
A hologram consists of a 2D or 3D image.