Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Having nonreactant particles of defined size
Patent
1992-12-04
1993-12-21
Schwartz, Pamela R.
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Having nonreactant particles of defined size
503200, 503209, 503215, 503226, B41N 540
Patent
active
052721272
ABSTRACT:
The present invention provides a heat sensitive recording material comprising a substrate, a recording layer formed over the substrate and containing a colorless or light-colored basic dye and a color acceptor, and a protective layer formed over the recording layer, the recording material being characterized in that microcapsules having an ultraviolet absorber enclosed therein and having substantially no color forming ability are incorporated in the protective layer.
Further, the present invention provides microcapsules having an ultraviolet absorber and as required an organic solvent enclosed therein, which have capsule wall film of synthetic resin and mean particle size of 0.1 to 3 .mu.m.
REFERENCES:
patent: 4511909 (1985-04-01), Arai
patent: 4626877 (1986-12-01), Arai et al.
patent: 4663642 (1987-05-01), Kameda et al.
Ishida Katsuhiko
Mandoh Ritsuo
Minami Takehiro
Mitoh Hisayoshi
Kanzaki Paper Manufacturing Co. Ltd.
Schwartz Pamela R.
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