Patent ID: 8780155

Claim:
A tape cassette configured to be used in a tape printing apparatus that performs printing on a print tape using a thermal head, wherein the tape cassette incorporates a print tape spool around which the print tape is wound and a ribbon spool around which an ink ribbon is wound, and wherein a print image such as a character is to be formed on the print tape through the ink ribbon using the thermal head, wherein the ink ribbon comprises: a base film; and a thermal printing ink layer formed on the base film and comprising a coloring layer containing wax and pigment, and an adhesive layer coated on the coloring layer, and wherein a congealing point of the thermal printing ink layer is 89 degrees Celsius or higher, and a difference between a melting point of the thermal printing ink layer and a glass transition point of the thermal printing ink layer is 23 degrees Celsius or smaller.