APPLICATION OF A NON TRANSPARENT LAYER AT VARIABLE PIGMENTS, PIGMENTS AND COATING COMPOSITION COMPRISING THE SAME, METHOD FOR PRODUCING THE SAME,SECURITY DOCUMENT AND METHOD FOR PRODUCING OPTICALLY VARIABLE SIGNS

摘要

The invention relates to optically variable pigments (10) having a colour shift between two distinct colours of any of the known designs. The pigments having incorporated a totally reflecting layer made by physical vapour deposition from aluminium alloy (11). This pigment exhibits excellent chromaticity, corrosion resistance, particularly in any kind of coating composition or printing ink and especially when water is present.