Tamper evident documents and inks

Authentication device for security documents

Optically variable devices, their production and use

Optically variable devices, their production and use

COMPRESSIBLE PHOTONIC CRYSTAL-BASED AUTHENTICATION DEVICE

SECURITY DOCUMENT

Security device

PIEZOCHROMIC SECURITY ELEMENT

Laminated printable multi-layer card with entrapped security element

Security document containing an authentication device

Laminated printable multi-layer card with entrapped security element

Printable intermediate construction incorporating registrably positioned laminate components that can be imaged and then easily formed into a laminated card or decal on demand