Optically variable element with colour shifting effect SWING
A pair of images which change their colour depending on illumination type. The element is printed on polymer substrate with iridescent ink containing liquid crystals. The colour of the images does not change in reflected light at different angles of illumination and observation. The colour shifting effect in the two images is observed in transmitted light: their colours are reversed.
a
b
Observation of colour shifting (changing) effect. Scheme:
a — view in reflected light under front illumination: blue colour of the number "50" and yellow colour of the symbols "RS"; b — view in transmitted light: yellow colour of the number "50" and blue colour of the symbols "RS"
a
b
c
d
e
Optically variable ink with colour shifting effect SWING. 50 Mauritius Rupees (2013):
a — front side of the banknote, clear window with the SWING element; b — SWING element, view in reflected light; c — the same image viewed in transmitted light; d — ink structure in reflected light (fragment of the number "5"); e — the same image viewed in transmitted light