ANTI-PHOTOCOPYING PAPER WITH CERTAIN REFLECTION SPECTRAL RESPONSE

摘要

A document has information appearing thereon, with at least a portion of the information being located on a front face of a portion of the document. The front face portion has a colour with a sufficiently low reflection spectral response to render the document portion substantially incapable of being photocopied in an information-readable manner. The document portion is capable of transmitting visible light from the rear face to the front face to cause sufficient contrast between the relatively non-translucent information and the transmitted light to enable the information to be read by a human eye viewing the front face of the document when visible light is transmitted through the document from the rear face to the front face.