Abstract: A security document or device having a substrate (2), a smooth highly reflective layer (1) applied to the substrate (2) and having a reflectivity of at least 60 gloss units, a raised printed image (3) of lines or dots applied to said reflective layer (1) by a printing process and having a height of about 10 to 100 &mgr;m, and typically about 30 &mgr;m, and a similar spacing being adjacent lines or dots, the hue chroma value of the ink used to print the image being between 30 and about 50 chroma units tending towards a saturation value of 60 chroma units, the lightness of the ink being at least 50 L degrees (lightness units), and typically between 70 and 100 L degrees.