Papierfabrik August Koehler Ag

Pelikan Aktiengesellschaft

Claus Hartmann

Gunther Pietsch

Hans Paffhausen

Ulrich Kohle

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.

Process for encapsulating dissolved reactants of color reaction systems,

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 capsulates 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.

Process for encapsulating dissolved reactants of color reaction system

A multiuse carbon transfer material, e.g. a carbon 'paper' or carbon ribbon has a synthetic resin support film or foil having a coating which contains, in addition to a synthetic resin binder, a coloring agent of an oil base type. The oil forming the base for this coloring agent is a polyoxyethylene tenside which forms a plasticizer for the synthetic resin material of the binder.

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Hanover, Germany

Claus Hartmann