Seal-type thermal transfer image-receiving sheet

A seal-type thermal transfer image-receiving sheet comprising:

• a release section;
• and
• an integrated seal section;
• wherein the seal section is provided peelably from the release section,
• wherein the seal section has a layered structure in which a pressure-adhesive layer, a primer layer, and a receiving layer capable of receiving a sublimable dye are layered, in that order, from a side of the release section, and
• wherein the primer layer contains a colorant,
• wherein, when the seal section is peeled off from the release section, a reference plate and the peeled off seal section are superposed together, and a reflection density of the reference plate is measured through the seal section from the side of the seal section, a value of the reflection density is in a range of 15% or more to 40% or less of a reflection density of the reference plate alone,
• wherein, when the reference plate and the seal-type thermal transfer image-receiving sheet are superposed together, and a reflection density of the reference plate is measured through the seal-type thermal transfer image-receiving sheet from the side of the seal-type thermal transfer image receiving sheet, the value of the reflection density is in a range of 15% or more to 40% or less of the reflection density of the reference plate alone,
• wherein a color of the reference plate is black, and a reflection density of the reference plate is 1.81,
• wherein the release section includes a back face layer located on a outermost surface on a side not in contact with the seal section, and
• wherein the back face layer contains at least one of porous silica particles and nylon particles.