OPTISCH VARIABELE PIGMENTE MIT EINEM FARBWECHSEL ZWISCHEN ZWEI VERSCHIEDENEN FARBEN, DIESE ENTHALTENDE BESCHICHTUNGSZUSAMMENSETZUNG, VERFAHREN ZU IHRER HERSTELLUNG

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.