Permanent reproductions and formation method therefor

Details Permanent reproductions and formation method therefor Permanent reproductions and formation method therefor

1984-03-29

1986-09-02

Downey, Mary F.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making named article

430272, 430275, 430278, 430321, 430322, 430325, 430326, 430357, 430367, 430374, 430524, 430525, 430526, G03C 500, G03C 700

Patent

active

046096132

ABSTRACT:
Permanent gray-scale reproductions including half-tone images. A refractory background region bears refractory thin-film dichroic filter means patterned to conform to the reproduced half-tone image. Preferred background region materials include metals, semiconductors, and ceramics; the thin-film materials are preferably oxides or nitrides of metals and semiconductors. If the refractory materials are appropriately selected, the reproductions are highly resistant to chemical and thermal deterioration and should have useful lives in the hundreds of thousands of years.

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patent: 4094679 (1978-06-01), Washizawa et al.
patent: 4246328 (1981-01-01), Sato et al.
patent: 4276368 (1981-06-01), Heller et al.
patent: 4292393 (1981-09-01), Wada et al.

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