Pressure-sensitive recording medium

Details Pressure-sensitive recording medium Pressure-sensitive recording medium

1988-10-21

1989-07-18

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Identified organic electron acceptor other than phenolic resin

427151, 428342, 428914, 503210, 503211, 503212, 503220, 503223, 503225, B41M 516, B41M 522

Patent

active

048493970

ABSTRACT:
A pressure-sensitive recording medium producing a colored image utilizing the reaction between a substantially colorless electron donating dye precursor and an electron accepting developer is disclosed. This recording sheet is characterized in that the electron accepting developer layer contains an aromatic carboxylic acid metal salt and the electron donating dye precursor layer contains (a) an indolylazaphthalide compound and (b) Crystal Violet lactone.

REFERENCES:
patent: 4295663 (1981-10-01), Petitpierre et al.
patent: 4508897 (1985-04-01), Bedekovic et al.
patent: 4688060 (1987-08-01), Tanaka et al.

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