Optically Variable Ink with Embossing

A complex optically variable security element. It contains an image printed by an optically variable ink OVI which plays a role of the background for the second image applied by blind embossing.

A dual optical effect appears when viewed at different angles of observation and illumination: a color change of the background image and visualization of the second image due a treatment of light and the shade which appears at the ridges of relief elements. An image which applied by blind embossing is not visible at a right angle (fig. 1).

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