Datalase Limited

Christopher Anthony Wyres

Anthony N Jarvis

Martin Robert Walker

William Green

Nazir Khan

John Cridland

Adam O'Rourke

Tristan Phillips

Trevor Wilson

Martin Walker

Benjamin Mulchin

Tristan Philips

A method of forming an image on a substrate by applying energy, involves a substrate in or on which there are at least two different colour-change agents, i.e. a first colour-change agent capable of giving rise to at least two different colours; and a second colour-change agent capable of giving rise to at least one different colour than achievable with the first colour change agent. A preferred embodiment of the invention is a multi-layer laminate comprising, in order, a layer comprising the first agent, a barrier layer, and a layer comprising the second agent.

Method of forming an image on a substrate

A method of forming an image on a substrate by applying energy, involves a substrate in or on which there are at least two different color-change agents, i.e. a first color-change agent capable of giving rise to at least two different colors; and a second color-change agent capable of giving rise to at least one different color than achievable with the first color change agent. A preferred embodiment of the invention is a multi-layer laminate comprising, in order, a layer comprising the first agent, a barrier layer, and a layer comprising the second agent.

A method of forming an image on a substrate, which comprises applying to the substrate an activatable color forming compound wherein said activatable color forming compound is initially unreactive but becomes reactive upon activation; activating said color forming compound in the areas of the substrate where the image is to be formed, and, reacting the activated color forming compound into its colored form to produce an image. A substrate imaged using this method is also provided.

Laser imaging

A method of manufacturing a paper substrate comprising a color former which is capable undergoing a light activated color change reaction, wherein the color former is applied to the paper substrate during the manufacture of said paper substrate, and the color former is a metal oxyanion or a molecular organic. A paper substrate obtainable by this method is also provided.

Laser imageable paper

The invention relates to a method of marking a substrate comprising treating the substrate with a boron compound and a charrable agent, and, irradiating the areas of the substrate to be marked such that those areas change colour. Marked substrates obtainable by this method are also provided.

Substrate marking

The invention relates to use of a diacetylene compound as a color former wherein the diacetylene compound has one of general formulae (I) to (V). The invention also includes methods of imparting color to a material including a compound as defined above, which comprises subjecting the material to irradiation. 

Polychromic substances and their use

A tape construct comprises a laser-imageable composition, whereby images can be created in said tape by irradiation with a laser. In an alternative, a laser-imageable formulation suitable for spray application to a substrate, comprises a color-former, a binder and a carrier.

Laser-imageable marking compositions

A colorless or transparent composition comprises a charge-delocalization compound and a photoacid, wherein the photoacid generates an acid on irradiation or heating, thereby forming a colored change-transfer complex with said compound.

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Cheshire, United Kingdom

Christopher Anthony Wyres