Copy restrictive color-negative photographic print media

Details Copy restrictive color-negative photographic print media Copy restrictive color-negative photographic print media

1997-06-12

1999-12-14

Huff, Mark F.

Radiation imagery chemistry: process, composition, or product th

Imaged product

Antifraud or antitampering

283902, 283 93, 399366, G03C 176, B42D 1500

Patent

active

060015160

ABSTRACT:
A color-negative photographic print medium for restricting the copying of an image in the medium utilizing a pattern of removable color-subtractive microdots depth-wise positioned anywhere within a transparent protective overcoat and a support layer which supports at least one image-forming layer is disclosed. The microdots are undetectable by the unaided eye, but detectable by copying machines programmed to prevent copying when microdots are detected.

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