A secure substrate may include a base layer and an opacity layer disposed above the base layer. An optional background layer may be disposed above the opacity layer. The secure substrate may further include an inkjet receptive layer. A first inkjet receptive layer may be disposed above the background layer, and a second inkjet layer may be disposed below the base layer. The opacity layer may include copper such as metallic copper flakes or other particles. The opacity layer may also include a binder material such as polyvinyl alcohol, and in some cases also carbon black, process black, or the like.

An information processing apparatus includes a storage section that stores device identification information of a terminal device authenticated to validate a printed matter, in advance, a receiving section that receives a random pattern acquired from a partial area of a surface of a printed matter intended to be validated, printed-matter identification information capable of individually identifying the printed matter, and device identification information of a terminal device that acquires the random pattern, a control section that, in a case where the device identification information received by the receiving section coincides with any piece of the device identification information stored in the storage section, controls the storage section to store the random pattern and the printed-matter identification information received by the receiving section in association with each other, and a validation section that validates the printed matter having the random pattern stored in the storage section, to be usable.

An information processing apparatus includes a storage section that stores device identification information of a terminal device authenticated to validate a printed matter, in advance, a receiving section that receives a random pattern acquired from a partial area of a surface of a printed matter intended to be validated, printed-matter identification information capable of individually identifying the printed matter, and device identification information of a terminal device that acquires the random pattern, a control section that, in a case where the device identification information received by the receiving section coincides with any piece of the device identification information stored in the storage section, controls the storage section to store the random pattern and the printed-matter identification information received by the receiving section in association with each other, and a validation section that validates the printed matter having the random pattern stored in the storage section, to be usable.

The invention relates to securing of an article against forgery and falsifying of its associated data, and particularly of data relating to its belonging to a specific batch of articles, while allowing offline or online checking of the authenticity of a secured article and conformity of its associated data with respect to that of a genuine article.

The invention relates to securing of an article against forgery and falsifying of its associated data, and particularly of data relating to its belonging to a specific batch of articles, while allowing offline or online checking of the authenticity of a secured article and conformity of its associated data with respect to that of a genuine article.

An optical device includes an array of lenses and a plurality of first and second segments disposed under the array of lenses. At a first viewing angle, the array of lenses presents a first image for viewing without presenting the second image for viewing, and at a second viewing angle different from the first viewing angle, the array of lenses presents for viewing the second image without presenting the first image for viewing. In some examples, individual ones of the first and second segments can comprise specular reflecting, transparent, diffusely reflecting, and/or diffusely transmissive features. In some examples, individual ones of the first and second segments can comprise transparent and non-transparent regions. Some examples can incorporate more than one region producing an optical effect.

An optical device includes an array of lenses and a plurality of first and second segments disposed under the array of lenses. At a first viewing angle, the array of lenses presents a first image for viewing without presenting the second image for viewing, and at a second viewing angle different from the first viewing angle, the array of lenses presents for viewing the second image without presenting the first image for viewing. In some examples, individual ones of the first and second segments can comprise specular reflecting, transparent, diffusely reflecting, and/or diffusely transmissive features. In some examples, individual ones of the first and second segments can comprise transparent and non-transparent regions. Some examples can incorporate more than one region producing an optical effect.

A method for printing a printing designed as a color-tilting surface onto an object surface includes a) printing a relief structure having strip-shaped webs onto the object surface, the strip-shaped webs being spaced apart and raised relative to the surface and each having first and second side flanks, and b) conformal printing of a pattern with first color strips parallel to but laterally offset from the webs. As a result, the first color strips more strongly determine color, brightness and/or another visual, optical or wavelength-related property viewed obliquely from the first side flanks than viewed obliquely from the second side flanks. At least in step b) a digital printing technique carries out the printing to permit variable predetermination of at least the first color strip dimensions, positions and/or contours. A colored isotropic printing ink and/or printing compound is used as the printing ink and/or printing compound.

Paper substrates which incorporate covert marking pigments (CMPs) which are one or more infrared (IR) anti-Stokes pigments. Also, processes for incorporating such CMPs into a paper substrate other than by a printing technique, such as, for example, by using a size press or spraying, as well as processes for identifying the presence of such CMPs incorporated into a paper substrate sheet with an infrared (IR) pigment sensor of, for example, a copier or printer for the purpose of adjusting the quantity of printer pigment deposited on a paper substrate sheet or to determine whether the paper substrate sheet is an authentic or counterfeit document.

An optical device includes an array of lenses and a plurality of segments disposed under the array of lenses. The plurality of segments corresponds to a plurality of images. Upon tilting the device at different viewing angle, the array of lenses presents images sequentially. In some examples, individual ones of the segments can comprise specular reflecting, transparent, diffusely reflecting, and/or diffusely transmissive features. In some examples, individual ones of the segments can comprise transparent and non-transparent regions. Some examples can incorporate more than one region producing an optical effect.