Invisible information recorded medium

Details Invisible information recorded medium Invisible information recorded medium

1994-01-19

1996-04-02

Ryan, Patrick J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428199, 428206, 428212, 428690, 428913, B32B 300

Patent

active

055039049

ABSTRACT:
An object of the present invention is to provide an invisible information recorded medium having an identification mark. In order to achieve the object, an invisible information recorded medium is provided having an identification mark recorded thereon, the identification mark being composed of a region having a high reflectance and a region having a low reflectance as compared with the reflectance of the medium in the same near infrared ray region.

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Patent Abstracts of Japan, vol. 9, No. 122 (p.-359) (1845) May 28, 1985 of JP-A-60-8880.

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