The International Hologram Manufacturers Association (IHMA) claim that a new development of edible holograms could help food integrity and prevent fraud. This follows a report that US scientists have been able to embed edible holograms into chocolate. These are made from a thin film of a dried solution of glucose syrup, vanilla and water, which is coated with a fine layer of non-toxic black dye. The dye is etched off using direct laser interference patterning, leaving raised nanoscale lines, which act as a diffraction grating and produces the image or information visible on the hologram. Whilst the development only works for certain types confectionery, it has opened up a host of opportunities and innovations in the control and labelling of food.
Read the article here