Patent ID: 7754039

Claim:
A manufacturing method of a compressible printing layer, comprising: preparation of an unvulcanized compressible printing layer which comprises an unvulcanized compressible layer containing a rubber material and microcapsules, a first fabric layer laminated on one surface of the unvulcanized compressible layer and a second fabric layer laminated on the other surface of the unvulcanized compressible layer; and application of a vulcanizing treatment to the unvulcanized compressible printing layer, and the vulcanizing treatment comprises: a first heating process in which a surface of the first fabric layer contacts with a surface of at least one first heated metal roll while applying tension to the unvulcanized compressible printing layer in a moving direction of the unvulcanized compressible printing layer; and a second heating process in which a surface of the second fabric layer contacts with a surface of at least one second heated metal roll while applying tension to the unvulcanized compressible printing layer in a moving direction of the unvulcanized compressible printing layer.