Direct thermographic materials with catechol borate reducing...

Record receiver having plural interactive leaves or a colorless – Having a colorless color-former – developer therefor – or... – Method of use – kit – or combined with marking instrument or...

Reexamination Certificate

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C503S212000

Reexamination Certificate

active

11183609

ABSTRACT:
Non-photosensitive direct thermographic materials comprise a reducing agent that is a catechol borate compound. These compounds can reduce silver(I) ion to metallic silver to produce a dense black silver image under the short time and high temperature conditions that occur when using thermal print-heads during direct thermal printing.

REFERENCES:
patent: 5582953 (1996-12-01), Uyttendaele et al.
patent: 6093528 (2000-07-01), Terrell et al.
patent: 2004/0007693 (2004-01-01), Moulton
patent: 0 692 733 (1996-01-01), None
patent: 0 903 625 (1999-03-01), None

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