The invention relates to a forgery-proof marking for objects, such as check cards, banknotes, labels and the like, comprising a plastic transparent film (1) having a first and second surface, whereby a series of layers is applied to the second surface. When viewed from the first surface, the color of this series of layers changes according to the viewing angle, and the series of layers is formed from an absorber layer provided on the second surface, from a spacer layer (3) overlying the absorber layer, and from a mirror layer (2) overlying the spacer layer (3). In order to improve the machine identification of the authenticity of the marking, the invention provides that the absorber layer is comprised of metallic clusters (4).

Forgery-proof marking for objects and method for identifying such a marking

A multilayer white polymeric film having a core layer with an optical transmission density greater than 2.0, a white polyester outer layer on either side of the core layer and an ink receptive layer on the outer surface of the white polyester layers.

Opaque polyester film as substrate with white coatings on both sides

Optical reflective film, preparation method thereof and liquid crystal display device using same

A method includes providing a plurality of variables and a variable. The variables differ from each other. The variables differ from the variable. The further method includes providing a lookup table indexing a plurality of characters via a plurality of values based on a first numeral system, converting a message into a first sequence of values based on the table, converting the first sequence into a second sequence of values based on a second numeral system different from the first system and according to a preset format, combining the second sequence into a single sequence via removing the format, generating a first plurality of subsequences from the single sequence based on segmentation of the sequence via alternating the variables, converting the first subsequences into a second plurality of subsequences such that each of the second subsequences is sized according to the variable, and transmitting the second subsequences.

Technologies for enhancing computer security

A semi-crystalline biaxially oriented film comprising a copolyester which comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and the monomer of formula (I): (I) wherein n=2, 3 or 4, Z is C═0, and wherein comonomer (I) constitutes a proportion of the glycol fraction of the copolyester and is present in an amount of at least about 4 mol % of the glycol fraction of the copolyester.

Copolyesterimides derived from n,n'-bis-(hydroxyalkyl)-benzophenone-3,3',4,4'-tetracarboxylic diimide and films made therefrom

The use of a multilayer film to store or retrieve information, said information being correlated to the multilayer structure of the film, and said multilayer film comprising at least two different types of layer, wherein each type of layer exhibits a different optical property and wherein the multilayer film comprises a plurality of layers of each of at least two of the different types of layer; a method of storing information, a method of retrieving stored information and a method of protecting against counterfeiting or fraud, which method utilises said multilayer film.

Multi-layer polymeric film and the use thereof

A film comprising a copolyester wherein said copolyester comprises repeating units derived from an aliphatic glycol, an aromatic dicarboxylic acid, and a comonomer (M) selected from the group consisting of N,N′-bis-(2-hydroxyalkyl)-bicyclo-[2,2,2]-oct-7-ene-2,3,5,6-tetracarboxylic diimide (BODI) and 2-hydroxyalkyl-2-[p-(2-hydroxyethoxycarbonyl)phenyl]-1,3-dioxo-2H-isoindole-5-carboxylate (DOIC), wherein the number of carbon atoms is the 2-hydroxyalkyl group is 2, 3 or 4, and wherein comonomer (M) constitutes a proportion of the glycol fraction of the copolyester.

Copolyesterimides derived from aromatic dicarboxylic acids and aliphatic glycols and films made therefrom

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Multi-layer polymeric film and the use thereof

Copolyesterimides derived from aromatic dicarboxylic acids and aliphatic glycols and films made therefrom