Bank of Canada

National Research Council of Canada

Sicpa Holding Sa

Andrea Victoria Firth

Steven Paul McGarry

Alasdair Patrick Rankin

Claude-Alain Despland

Pierre Degott

Jianfu Ding

Theodoros Garanzotis

Christine Reinhard

Farid Bensebaa

Jessica Krueger

Pascal L'Ecuyer

Disclosed herein are devices that change their appearance and/or physical properties when under an external influence, and methods for their production and use. Such devices may be used as features of any type of items, documents, billboards, posters, display devices, advertisements and other items etc. and may be adapted to include decipherable content. Such devices also afford new techniques for a user to check quickly and easily whether the item is a legitimate or a counterfeit copy, either by hand-manipulation of the device, or with the assistance of an additional screening tool.

Optically variable devices, their production and use

Magnetic ink and toner compositions traditionally comprise magnetic materials in fine particulate form, either as a dry composition or a liquid suspension. Often such materials are black or dark in color. Disclosed herein are particles compositions suitable for use as inks or toners, that exhibit desirable magnetic properties, and furthermore which include particles coated so they appear white substantially white, or colored. Such compositions present new opportunities for the production of corresponding magnetic layers, when the compositions are deposited in an appropriate manner to a substrate.

Ink or toner compositions, methods of use, and products derived therefrom

The invention discloses an ink for the engraved steel die printing process, having a viscosity at 40&#xb0; C. between 3 Pa&#xb7;s to 15 Pa&#xb7;s, preferably 5 to 10 Pa&#xb7;s, and having a polymeric organic binder and magnetic pigment particle, characterized in that said magnetic pigment particles comprises a magnetic core material which is surrounded by at least one layer of another material. The surrounding layers, single or in combination, confer the pigment particle particular optical properties in the visible and/or in the near IR, chosen from high specular or diffuse reflectance, spectrally selective absorption or reflection, and angle-dependent absorption or reflection, and allow for the formulation of inks having a large gamut of color and other optical functionalities.

Clear magnetic intaglio printing ink

Hybrid semiconductor materials have an inorganic semiconductor incorporated into a hole-conductive fluorene copolymer film. Nanometer-sized particles of the inorganic semiconductor may be prepared by mixing inorganic semiconductor precursors with a steric-hindering coordinating solvent and heating the mixture with microwaves to a temperature below the boiling point of the solvent.

Hybrid nanocomposite semiconductor material, and method of producing inorganic semiconductor therefor

Growing community of inventors

Ottawa, Canada

Andrea Victoria Firth