A reusable notebook is used with heat-erasable ink. The reusable notebook includes a binding configured to hold a plurality of pages, at least one cover, and at least one ready indicator. The ready indicator is configured to indicate that at least one page in the notebook has reached at least a critical temperature. The critical temperature is a predetermined minimum temperature that is sufficient to erase thermochromic ink on the page(s). The indication occurs when the ready indicator is at a temperature equal to or above a predetermined minimum temperature referred to as the ready temperature. When the ready indicator is at or above the ready temperature, the critical temperature of the at least one page is reached.

A system and associated method, the system including an item including a porous polymer layer including a polymer material capable of absorbing a liquid, the polymer material having an index of refraction that is the same or substantially the same as an index of refraction of the liquid, and a substrate layer, where the porous polymer layer is disposed on the substrate layer, and a liquid source comprising the liquid, where the porous polymer layer appears transparent in response to absorption of the liquid from the liquid source by the porous polymer layer.

The present invention relates to the field oxidative drying inks suitable for offset, letterpress and intaglio printing. In particular, it relates to oxidative drying inks for printing by an offset process, letterpress process or intaglio process on a non-porous substrate selected from the group consisting of polymer materials, composite materials, metals or metalized materials and combinations thereof, said oxidative drying ink comprising at least one oxidative drying varnish and one or more neutral manganese complex compounds.

The present invention relates to the field oxidative drying inks suitable for offset, letterpress and intaglio printing. In particular, it relates to oxidative drying inks for printing by an offset process, letterpress process or intaglio process on a non-porous substrate selected from the group consisting of polymer materials, composite materials, metals or metalized materials and combinations thereof, said oxidative drying ink comprising at least one oxidative drying varnish and one or more neutral manganese complex compounds.

A composition including a first color shifting pigment having a first color shift that extends from a starting color at normal through a plurality of colors as a viewing angle is increased to a final color, wherein the first color shift rotates counterclockwise relative to, and about, an origin of the L*a*b* color space; and a color filter that transmits a portion of the first color shift of the first color shifting pigment and absorbs a remainder of the first color shift of the first color shifting pigment; wherein the composition has a second color shift different from the first color shift; and wherein the second color shift has a first portion that rotates counterclockwise relative to the origin and a second portion that rotates clockwise relative to the origin is disclosed. A security device including the composition is included. A method of making the composition and a method of authenticating the security device are also disclosed.

A composition including a first color shifting pigment having a first color shift that extends from a starting color at normal through a plurality of colors as a viewing angle is increased to a final color, wherein the first color shift rotates counterclockwise relative to, and about, an origin of the L*a*b* color space; and a color filter that transmits a portion of the first color shift of the first color shifting pigment and absorbs a remainder of the first color shift of the first color shifting pigment; wherein the composition has a second color shift different from the first color shift; and wherein the second color shift has a first portion that rotates counterclockwise relative to the origin and a second portion that rotates clockwise relative to the origin is disclosed. A security device including the composition is included. A method of making the composition and a method of authenticating the security device are also disclosed.

An example container includes: structure having an interior and an exterior. The interior is to contain an electronic product. The exterior comprises: a first label of a first type of polychromatic ink to be activated at a first wavelength; and a second label of a second type of polychromatic ink to be activated at a second wavelength different from the first wavelength; the first label to indicate a first set of features to be configured at the electronic product using a first wireless signal; and the second label to indicate a second set of features to be configured at the electronic product using a second wireless signal. The structure is transparent to the first wireless signal and the second wireless signal.

An example container includes: structure having an interior and an exterior. The interior is to contain an electronic product. The exterior comprises: a first label of a first type of polychromatic ink to be activated at a first wavelength; and a second label of a second type of polychromatic ink to be activated at a second wavelength different from the first wavelength; the first label to indicate a first set of features to be configured at the electronic product using a first wireless signal; and the second label to indicate a second set of features to be configured at the electronic product using a second wireless signal. The structure is transparent to the first wireless signal and the second wireless signal.

A structure for secure containment of information (SSCI) that is in the form of a laminate which includes at least two layers. The laminate is constructed to contain information such as a code, serial number, informational feature, encryption key or personal identification number (PIN). The information is located between the layer of the laminate such that the code, serial number, informational feature, encryption key, or PIN is not detectable from outside the laminate. The SSCI is configured to provide access and expose the code, serial number, informational feature, encryption key, or PIN by delaminating at least one layer, thereby indicating that tampering has occurred to the laminate. The SSCI can also function as a public key or private key for a blockchain, to provide access to a physical lock or to provide account access to claim financial value.

A structure for secure containment of information (SSCI) that is in the form of a laminate which includes at least two layers. The laminate is constructed to contain information such as a code, serial number, informational feature, encryption key or personal identification number (PIN). The information is located between the layer of the laminate such that the code, serial number, informational feature, encryption key, or PIN is not detectable from outside the laminate. The SSCI is configured to provide access and expose the code, serial number, informational feature, encryption key, or PIN by delaminating at least one layer, thereby indicating that tampering has occurred to the laminate. The SSCI can also function as a public key or private key for a blockchain, to provide access to a physical lock or to provide account access to claim financial value.