OPTICALLY VARIABLE MAGNETIC INK ( OVMI)

Dynamic color-shifting ink developed . Pigments of the magnetic ink used are oriented with the help of the magnetic field so that when the angle of illumination or observation changes, the image changes its color. As result, there is a rolling-bar dynamic effect (a beam of light moving diagonally across the image). Is applied by screen printing, contains ferromagnetic pigments.

a

a —  Paper substrate (front endpaper), polymer substrate ; 

b —  Zoomed fragment.  security feature. Nontransparent metallized pigments; 

c, d —  A rolling-bar dynamic effect (a beam of light moving diagonally across the image). Color shifting. View at different angles of observation