Thermosensitive color-changing dry offset ink and a printed material using the same
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United States of America Patent
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Mar 8, 2005
Grant Date -
Dec 12, 2002
app pub date -
Jun 6, 2002
filing date -
Jun 8, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
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.
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