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Fingerprint Receptor Coating

IP.com Disclosure Number: IPCOM000084447D
Original Publication Date: 1975-Nov-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Jablonski, RB: AUTHOR

Abstract

The present process relates to fingerprinting which is carried out without the use of conventional visible inks. A finger is pressed briefly into a pad marketed by Faurot, Incorporated, whereby a thin film of colorless ferric ions is formed on the finger, which is then pressed onto a material, such as, paper which has been coated with a fluid containing propyl gallate. The reaction between the ferric ions and the propyl gallate results in a dark image of the fingerprint.

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Fingerprint Receptor Coating

The present process relates to fingerprinting which is carried out without the use of conventional visible inks. A finger is pressed briefly into a pad marketed by Faurot, Incorporated, whereby a thin film of colorless ferric ions is formed on the finger, which is then pressed onto a material, such as, paper which has been coated with a fluid containing propyl gallate. The reaction between the ferric ions and the propyl gallate results in a dark image of the fingerprint.

The formulation of the propyl gallate fluid to be applied to the sheet includes propyl gallate, hydrous aluminum silicate, an ink vehicle polyethylene wax, silicone fluid, and ethyl acetate.

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