Document authentification paper

Details Document authentification paper Document authentification paper

1975-07-30

1977-07-19

Kendall, Ralph S.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428207, 428211, 428537, 428916, 283 8R, 283 9R, 8 7, 8 44, 427 7, 162140, D21H 510

Patent

active

040370070

ABSTRACT:
Paper for use in the production of security documents incorporates planchettes which have incorporated therein or applied thereto a substance which is capable of taking part in a color-forming reaction. A second substance which is capable of taking part in a different color-forming reaction may be incorporated in other planchettes. When a reagent or reagents is or are applied to the security document to verify the authenticity of the document the substances change color by the color-forming reactions.
Examples of security documents which may be made from such paper are bank cheques, travellers' cheques and other negotiable documents convertible to cash.

REFERENCES:
patent: 248198 (1881-10-01), Nesbit
patent: 2309178 (1943-01-01), Fallon et al.
patent: 2445586 (1948-07-01), Simons
patent: 3001887 (1961-09-01), Ahlm et al.

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