Disclosed is a reveal substrate comprising: a) a top substrate layer comprising an opaque polymer sensitive to application of heat or pressure, and becoming transparent upon being heated to a predetermined temperature or subjected to a predetermined pressure, and b) a bottom substrate layer having one or more colored areas on a top surface thereof, disposed such that said one or more colored areas are obscured by the opaque polymer prior to being heated to the predetermined temperature or subjected to the predetermined pressure, and are revealed subsequent thereto, wherein: each of the one or more colored areas comprises at least two different colors, and comprises a two-dimensional matrix formed by a plurality of color blocks, each one of the plurality of color blocks having only one color, and the color blocks are arranged to have a repeating color pattern. Alternatively the top substrate layer comprises an opaque material which can be induced by, e.g., UV, to become transparent. Further the top substrate layer can comprise a transparent material which can be induced by, e.g., UV, to become opaque. Methods of using the disclosed substrates are also disclosed.

Disclosed is a reveal substrate comprising: a) a top substrate layer comprising an opaque polymer sensitive to application of heat or pressure, and becoming transparent upon being heated to a predetermined temperature or subjected to a predetermined pressure, and b) a bottom substrate layer having one or more colored areas on a top surface thereof, disposed such that said one or more colored areas are obscured by the opaque polymer prior to being heated to the predetermined temperature or subjected to the predetermined pressure, and are revealed subsequent thereto, wherein: each of the one or more colored areas comprises at least two different colors, and comprises a two-dimensional matrix formed by a plurality of color blocks, each one of the plurality of color blocks having only one color, and the color blocks are arranged to have a repeating color pattern. Alternatively the top substrate layer comprises an opaque material which can be induced by, e.g., UV, to become transparent. Further the top substrate layer can comprise a transparent material which can be induced by, e.g., UV, to become opaque. Methods of using the disclosed substrates are also disclosed.

Provided are a material for pressure measurement, including a color forming layer that contains microcapsules A encapsulating an electron-donating colorless dye precursor and microcapsules B not encapsulating an electron-donating colorless dye precursor, in which a volume standard median diameter D50A of the microcapsules A and a volume standard median diameter D50B of the microcapsules B satisfy Equation 1; a material composition for pressure measurement; and a material set for pressure measurement:

D50A<D50BEquation 1.

A device for the reversible indication of applied pressure by a colour change comprising a translucent layer and a coloured layer comprising an elastomer associated by means of an apertured layer, comprising one or more apertures.

A device for the reversible indication of applied pressure by a colour change comprising a translucent layer and a coloured layer comprising an elastomer associated by means of an apertured layer, comprising one or more apertures.

A method for making an imprint of a surface of a fish, including supplying a fish and a fish imprint kit, where the fish imprint kit includes a developer-coated paper having a developer agent, a nonpigmented activation solution having an activation agent, an applicator, and a set of instructions for applying the activation solution to the surface of the fish with the applicator and making an imprint of the surface of the fish on the developer-coated paper, where the developer agent and activation agent are capable of reacting to produce color when combined. The method further includes applying the nonpigmented activation solution having the activation agent to a surface of the fish; and contacting the developer-coated paper having the developer agent with the surface of the fish such that the activation agent in the nonpigmented activation solution on the surface of the fish reacts with the developer agent of the developer-coated paper to produce color and form the imprint of the surface of the fish on the developer-coated paper. Applying the nonpigmented activation solution to the surface of the fish includes wiping the nonpigmented activation solution onto the surface of the fish with an absorbent material.

A method for making an imprint of a surface of a fish, including supplying a fish and a fish imprint kit, where the fish imprint kit includes a developer-coated paper having a developer agent, a nonpigmented activation solution having an activation agent, an applicator, and a set of instructions for applying the activation solution to the surface of the fish with the applicator and making an imprint of the surface of the fish on the developer-coated paper, where the developer agent and activation agent are capable of reacting to produce color when combined. The method further includes applying the nonpigmented activation solution having the activation agent to a surface of the fish; and contacting the developer-coated paper having the developer agent with the surface of the fish such that the activation agent in the nonpigmented activation solution on the surface of the fish reacts with the developer agent of the developer-coated paper to produce color and form the imprint of the surface of the fish on the developer-coated paper. Applying the nonpigmented activation solution to the surface of the fish includes wiping the nonpigmented activation solution onto the surface of the fish with an absorbent material.

Systems and method provide a reveal substrate having a) an opaque polymer sensitive to at least one first application of at least one selected from heat, pressure and light, said opaque polymer becoming transparent upon being subjected to the at least one first application, and b) a bottom substrate layer having one or more colored areas on a top surface thereof, said bottom substrate layer being disposed such that the one or more colored areas are obscured by the opaque polymer prior to being subjected to the at least one first application and are revealed after at least one portion of the opaque polymer is subjected to the at least one first application.

Systems and method provide a reveal substrate having a) an opaque polymer sensitive to at least one first application of at least one selected from heat, pressure and light, said opaque polymer becoming transparent upon being subjected to the at least one first application, and b) a bottom substrate layer having one or more colored areas on a top surface thereof, said bottom substrate layer being disposed such that the one or more colored areas are obscured by the opaque polymer prior to being subjected to the at least one first application and are revealed after at least one portion of the opaque polymer is subjected to the at least one first application.

The present invention relates to a pressure-sensitive sheet having a function which can permanently conserve an indication showing different concentrations according to the intensity of an external pressure applied to pressure-sensitive paper. The pressure-sensitive sheet proposed by the present invention comprises a set of: a pressure-sensitive paper (10) having a surface to which ink (11) is applied; and a transparent film (20) which is disposed on the pressure-sensitive paper (10) and has a rear surface to which an adhesive agent (21) is applied.