COLOUR CODING SYSTEM FOR IDENTIFYING OBJECTS

摘要

The invention relates to a colour coding system for identifying objects, especially valuable documents. Said system comprises coloured particles which reflect in the visual spectral region and disperse at any angle. Said particles are so small that they are not visible to the naked eye, but can be identified by means of a magnifying glass or a microscope. Furthermore, these particles are present in such a low concentration that the colour coding is not detected by the naked eye as being the colour of the product.