Thermal imaging method

Details Thermal imaging method Thermal imaging method

1986-05-15

1988-01-19

Louie, Won H.

Radiation imagery chemistry: process, composition, or product th

Dye image from radiation sensitive dye or dye former by dry...

Composition or product

430343, 430945, 430955, 430964, 503218, 503221, 503222, 548455, 548467, 564 42, 564 44, 564 51, 564 56, G03C 172

Patent

active

047204508

ABSTRACT:
A method of thermal imaging is provided which comprises heating imagewise a layer of a colored di- or triarylmethane compound possessing within its di- or triarylmethane structure an aryl group substituted in the ortho-position to the meso carbon atom with a group comprising a thermally unstable urea moiety which fragments upon heating to provide a new group that bonds to the meso carbon atom whereby the di- or triarylmethane compound is rendered ring-closed and colorless in an imagewise pattern corresponding to said imagewise heating.

REFERENCES:
patent: Re29168 (1977-04-01), Haseltine et al.
patent: 3488705 (1970-01-01), Fox et al.
patent: 3745009 (1973-07-01), Jenkins et al.
patent: 3832212 (1974-08-01), Jenkins et al.
patent: 4380629 (1983-04-01), Yamashita et al.
patent: 4416971 (1983-11-01), Borror et al.
patent: 4602263 (1986-07-01), Borror et al.

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