Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Heavy metal reactant
Patent
1989-04-21
1991-01-15
Hess, Bruce H.
Record receiver having plural interactive leaves or a colorless
Having a colorless color-former, developer therefor, or...
Heavy metal reactant
427150, 427151, 428913, 503214, 503216, 503217, 503225, B41M 518
Patent
active
049853929
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.
Hess Bruce H.
Kirn Walter N.
Litman Mark A.
Minnesota Mining and Manufacturing Company
Sell Donald M.
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