Colored thermographic media

Details Colored thermographic media Colored thermographic media

Filed on

1989-04-21

Date issued

1991-01-15

Examiner

Hess, Bruce H.

Patent Class

Record receiver having plural interactive leaves or a colorless

SubClass

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

SubSubClass

Heavy metal reactant

Other Related Categories

427150, 427151, 428913, 503214, 503216, 503217, 503225, B41M 518

Type

Patent

Status

active

Patent number

049853929

Description

ABSTRACT:
The present invention provides an intensely colored thermographic medium useful for bar-coding applications which utilize near infrared scanning systems. The medium is formed of a substrate having on at least one surface thereof a coating comprising: a transparent film-forming binder, an organic solvent soluble catechol, a metal salt and colorant.

REFERENCES:
patent: 4020056 (1977-04-01), Farber
patent: 4107428 (1978-08-01), Farber
patent: 4531141 (1985-07-01), Sagawa
patent: 4658276 (1987-04-01), Kanda et al.
patent: 4704379 (1987-11-01), Shioi et al.
patent: 4730057 (1988-03-01), Kanda et al.
patent: 4748148 (1988-05-01), Kondo et al.
patent: 4808565 (1989-02-01), Whitcomb et al.

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