The problem is to provide a thermosensitive color-changing dry offset ink,
having no problem in an ink transferability and an excellent printing
characteristics. As a thermosensitive color-changing dry offset ink is
used one composed of thermosensitive, color-changing microcapsules mixed
in a vehicle the capsule having two particle size characteristics of (1)
particle size distribution: particles of less than 0.5 .mu.m are contained
in not less than 10 volume % and those not larger than 3.0 .mu.m are
contained in not less than 90 volume % and (2) mean particle diameter:
0.2-1.5 .mu.m.
