Fingerprinting system

Details Fingerprinting system Fingerprinting system

1981-03-27

1983-04-05

Lusignan, Michael R.

Coating processes

Body member printing

118 315, 427145, A61B 510

Patent

active

043791786

ABSTRACT:
Fingerprints images are formed by applying the distal portion 29 of a finger 32 to a porous pad 10 impregnated with a solution of marking compound. The finger portion may be prewetted or cleaned with cloth 30 impregnated with detergent solution. The finger 32 is then applied to a square 36 of a fingerprint card 38 impregnated with an aqueous solution of polyhydroxy developer such as 8-hydroxy-quinoline and propyl gallate containing a high molecular weight dibasic acid such as azelaic acid. A fingerprint image 40 immediately develops. Traces of the image can be removed with a cleaning solution impregnated cloth 42.

REFERENCES:
patent: 3960632 (1976-06-01), Gaines et al.
patent: 4232083 (1980-11-01), Buerkley et al.
patent: 4262623 (1981-04-01), Smith et al.
Jablonski, R. B. "Fingerprint Receptor Coating", in IBM Technical Bulletin, vol. 18, No. 6, Nov. 1975.

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