| PATENT CLAIMS |
Pressure sensitive copying material comprising a substrate carrying isolated droplets of an oil soln of at least 2 different chromogenic materials, said droplets being confined within resp. pressure-rupturable barriers, wherein the 2 different chromogenic materials are effective to together develop a color other than blue or black upon contact with color developer when the copying material is used, & wherein one of the chromogenic materials is fluorescent such that the copying material can be verified upon irradiation with UV light to produce fluorescence
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