3m Innovative Properties Company

Brian W Dunne

Mark F Schulz

Paul D Graham

Paul E Marecki

Richard J Kuo

Tadesse G Nigatu

Kenneth M White

Graeme R Mann

Mathias Detjen

Thomas Junck

A tamper-indicating printable sheet. A preferred embodiment of the invention provides a tamper-indicating printable sheet comprising a retroreflective layer comprising a plurality of microbeads partially embedded in an inkjet receptive beadbond layer; and a reflector layer between one of the microbeads and the inkjet receptive beadbond layer. The present invention provides a method of making a tamper-indicating printable sheet.

Tamper-indicating printable sheet for securing documents of value and methods of making the same

In one aspect, the invention provides a security laminate comprising a retroreflective layer comprising a plurality of retroreflective microbeads partially embedded in and protruding from a beadbond layer and having image receptive material disposed around the protruding microspheres. In another embodiment, the security laminate further comprises indicia patterns viewable in retroreflective light. In another embodiment, the security laminate is imaged on the image receptive material.

Security laminate

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Cambridge Park, Australia

Brian W Dunne