Heat-sensitive recording material

Details Heat-sensitive recording material Heat-sensitive recording material

1987-02-12

1988-03-15

Hess, Bruce H.

Record receiver having plural interactive leaves or a colorless

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

Heavy metal reactant

427151, 503211, 503212, 503216, 503225, B41M 518

Patent

active

047313536

ABSTRACT:
Disclosed is a heat-sensitive recording material comprising a base sheet and a heat-sensitive record layer formed over the base sheet and comprising a colorless or pale-colored basic dye and a color developing material capable of forming a color when contacted with the dye, the heat-sensitive recording material being characterized in that the heat-sensitive record layer contains as the color developing material at least one multi-valent metal salt of an indole-2-carboxylic acid derivative represented by the formula ##STR1## wherein R.sub.1 through R.sub.6 are hydrogen or other substituent. The heat-sensitive recording material is resistant to plasticizer and diazo developer, and also is suitable for high-speed recording.

REFERENCES:
patent: 4234212 (1980-11-01), Kato et al.
patent: 4303719 (1981-12-01), Vassiliades
patent: 4403791 (1983-09-01), Schmidt et al.
patent: 4590500 (1986-05-01), Satake et al.

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