Imaging medium includes an image-receiving substrate including a color-forming layer, a donor ribbon attached to the image-receiving substrate and including a color layer, and a repeated pattern. The repeated pattern is defined by a portion of each of the color-forming layer and color layer. A repeat of the pattern includes at least three adjacent colored stripes including a cyan or cyan-forming stripe, a magenta or magenta-forming stripe, and a yellow or yellow-forming stripe. A first of the at least three adjacent stripes is a color-forming stripe in the color-forming layer. A second of the at least three adjacent stripes is a colored stripe in the color layer. A third of the at least three adjacent stripes is either a second color-forming stripe in the color-forming layer or a second colored stripe in the color layer of the donor ribbon.

To provide a coating liquid for release layer with which a release layer having a small variation in the performance difference can be stably formed, to provide a method for producing a thermal transfer sheet using this coating liquid for release layer, and to provide a thermal transfer sheet having stable releasability. A thermal transfer sheet having a substrate 1, a release layer 2 provided on the substrate 1, and a transfer layer 10 provided on the release layer 2, wherein the transfer layer 10 is provided peelably from the release layer 2, and the release layer 2 contains a silsesquioxane.

To provide a coating liquid for release layer with which a release layer having a small variation in the performance difference can be stably formed, to provide a method for producing a thermal transfer sheet using this coating liquid for release layer, and to provide a thermal transfer sheet having stable releasability. A thermal transfer sheet having a substrate 1, a release layer 2 provided on the substrate 1, and a transfer layer 10 provided on the release layer 2, wherein the transfer layer 10 is provided peelably from the release layer 2, and the release layer 2 contains a silsesquioxane.

To provide a thermal transfer sheet capable of preventing print omission from occurring on a transfer layer to be transferred and producing of a print having a good gloss.

A back face layer 20 is provided on one surface of the substrate 1 and a transfer layer 10 is provided on the other surface of the substrate, the transfer layer 10 has a single-layer or layered structure including a protective layer 5, the back face layer contains spherical particles 25, and when the surface of the back face layer is observed using a scanning electron microscope (SEM) at a magnification of 5000 times, the proportion of the total of the projected areas of the spherical particles is 1.8% or more and 20% or less based on the area of the entire observed surface.

Disclosed is a heat-sensitive recording material comprising an undercoat layer and a heat-sensitive recording layer formed in this order on a support, the undercoat layer containing hollow plastic particles and a binder, the heat-sensitive recording layer containing a leuco dye and a developer, and the heat-sensitive recording material having an elastic modulus of 200 N/mm.sup.2 or less as measured by a nanoindentation method.

Disclosed is a heat-sensitive recording material comprising an undercoat layer and a heat-sensitive recording layer formed in this order on a support, the undercoat layer containing hollow plastic particles and a binder, the heat-sensitive recording layer containing a leuco dye and a developer, and the heat-sensitive recording material having an elastic modulus of 200 N/mm.sup.2 or less as measured by a nanoindentation method.

A reversible recording medium according to an embodiment of the present disclosure includes: a recording layer including a leuco pigment as a coloring compound; and a first barrier film that is provided on one surface and a side surface of the recording layer and suppresses mixing of at least one of water or oxygen.

A reversible recording medium according to an embodiment of the present disclosure includes: a recording layer including a leuco pigment as a coloring compound; and a first barrier film that is provided on one surface and a side surface of the recording layer and suppresses mixing of at least one of water or oxygen.

A thermal transfer image-receiving sheet has a primer layer and a receiving layer. The primer layer contains binder resin and metal pigment. When a value obtained by dividing the mass of the metal pigment by the mass of the binder resin is A and the thickness of the primer layer is B, A is 0.5 to 3.5, and A/B is 0.15 to 6. When light is made incident on the surface on the receiving layer side at an incident angle of 45°, ΔL* between L* at a light-receiving angle obtained by tilting specular reflection light, generated when light is made incident on the surface on the receiving layer side at an incident angle of 45°, toward the incident light side by 15° and L* at a light-receiving angle obtained by tilting the specular reflection light toward the incident light side by 110° is 110 or more.

A thermal transfer ribbon comprising a dye layer and a transferable protective layer repeatedly formed on one surface of a substrate, the transferable protective layer having a first layer formed on the substrate, and a second layer formed on the first layer. The first layer comprises an acrylic resin (X) containing methyl methacrylate, an acrylic resin (Y) containing a styrene resin, and a polyester resin (Z). X has a weight average molecular weight of 120000 or more, the mass ratio of X and Y is within the range of 1:9 to 9:1, and the mass of Z is 1% or more and 3% or less of the total mass of X and Y.