发明申请
US20120075701A1 OPTICALLY VARIABLE SECURITY DEVICES 审中-公开
光学可变的安全设备

OPTICALLY VARIABLE SECURITY DEVICES
摘要:
An optical device is formed by hot stamping a demetallized hologram to an optically variable foil or to a coating of optically variable ink. In another embodiment a hologram is hot stamped to a banknote or document printed with a color-shifting ink.
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