Method of forming a color-differentiated image utilizing a metas

Details Method of forming a color-differentiated image utilizing a metas Method of forming a color-differentiated image utilizing a metas

1989-12-18

1991-10-08

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Visible imaging using radiation only other than heating by...

430270, 430290, 430292, 430363, 430495, 430496, 430542, 430567, 430945, G03C 500, G03C 1494, G03C 100

Patent

active

050553801

ABSTRACT:
An aggregated-Group Ib metal colloid is prepared, which may be used to form stable color-differentiated images, by the selective application of thermal energy thereto. The metal aggregates, when exposed to thermal energy, revert either to the unaggregated metal or to an aggregate of lesser dimension. This change induces a color change in the material, which is clearly visible against those areas not so exposed. The metal aggregates, when dispersed in a polymeric matrix, are stable in the absence of heat.

REFERENCES:
patent: 4120728 (1978-10-01), Ikenoue
patent: 4459353 (1984-07-01), Maskasky
patent: 4837134 (1989-06-01), Bouldin
patent: 4849319 (1989-07-01), Inoue
Defensive Publication T-900,010.
"Carey Lea's Colloidal Silver" by Frens et al., Kolloid-Zeitschrift und Zeutschrift fur Polymers, Band 233-Heft 1-2.

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