Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Method of use – kit – or combined with marking instrument or...
Patent
1987-05-15
1988-05-31
Bell, Janyce A.
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Method of use, kit, or combined with marking instrument or...
427150, 427151, 427152, 427271, 427288, 503213, 503218, 503221, 503224, B41M 500
Patent
active
047481463
ABSTRACT:
The invention relates to a process for encapsulating solutions of reactants of color reaction systems by means of conventional encapsulation processes, the reactant initially being dissolved in a solvent with a good dissolving power and immediately prior to emulsification or encapsulation, a non-solvent, which only dissolves the reactant to an insignificant extent, is admixed with the fresh solution obtained in a quantity which adjusts a supersaturated system, the capsules obtainable as a result thereof, as well as their use with an encapsulated solution of a basic color former, which supplies a color by the reaction with acid reactants, in non-carbon paper.
REFERENCES:
patent: 3627581 (1971-12-01), Phillips
patent: 3804775 (1974-04-01), Shiozaki et al.
patent: 4219439 (1980-08-01), Miyake et al.
patent: 4299723 (1981-11-01), Dahm et al.
patent: 4428978 (1984-01-01), Jabs et al.
Hartmann Claus
Pietsch Gunther
Bell Janyce A.
Papierfabrik August Koehler AG
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